SpringMVC实现增删改查(CRUD)--全面详细讲解

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简介: SpringMVC实现增删改查(CRUD)--全面详细讲解

一,实现CRUD前准备工作

1.1 pom.xml依赖的配置

创建Model项目并导入相关pom.xml依赖

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
        <!--添加jar包依赖-->
        <!--1.spring 5.0.2.RELEASE相关-->
        <spring.version>5.0.2.RELEASE</spring.version>
        <!--2.mybatis相关-->
        <mybatis.version>3.4.5</mybatis.version>
        <!--mysql-->
        <mysql.version>5.1.44</mysql.version>
        <!--pagehelper分页jar依赖-->
        <pagehelper.version>5.1.2</pagehelper.version>
        <!--mybatis与spring集成jar依赖-->
        <mybatis.spring.version>1.3.1</mybatis.spring.version>
        <!--3.dbcp2连接池相关 druid-->
        <commons.dbcp2.version>2.1.1</commons.dbcp2.version>
        <commons.pool2.version>2.4.3</commons.pool2.version>
        <!--4.log日志相关-->
        <log4j2.version>2.9.1</log4j2.version>
        <log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
        <slf4j.version>1.7.13</slf4j.version>
        <!--5.其他-->
        <junit.version>4.12</junit.version>
        <servlet.version>4.0.0</servlet.version>
        <lombok.version>1.18.2</lombok.version>
        <mybatis.ehcache.version>1.1.0</mybatis.ehcache.version>
        <ehcache.version>2.10.0</ehcache.version>
        <redis.version>2.9.0</redis.version>
        <redis.spring.version>1.7.1.RELEASE</redis.spring.version>
        <jackson.version>2.9.3</jackson.version>
        <jstl.version>1.2</jstl.version>
        <standard.version>1.1.2</standard.version>
        <tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version>
        <commons-fileupload.version>1.3.3</commons-fileupload.version>
        <hibernate-validator.version>5.0.2.Final</hibernate-validator.version>
        <shiro.version>1.3.2</shiro.version>
    </properties>
    <dependencies>
        <!--1.spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--2.mybatis相关-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!--pagehelper分页插件jar包依赖-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>${pagehelper.version}</version>
        </dependency>
        <!--mybatis与spring集成jar包依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--mybatis与ehcache整合-->
        <dependency>
            <groupId>org.mybatis.caches</groupId>
            <artifactId>mybatis-ehcache</artifactId>
            <version>${mybatis.ehcache.version}</version>
        </dependency>
        <!--ehcache依赖-->
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>${ehcache.version}</version>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>${redis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>${redis.spring.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <!--3.dbcp2连接池相关-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>${commons.dbcp2.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-pool2</artifactId>
                    <groupId>org.apache.commons</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>${commons.pool2.version}</version>
        </dependency>
        <!--springmvc依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--4.log日志相关依赖-->
        <!-- log4j2日志相关依赖 -->
        <!-- log配置:Log4j2 + Slf4j -->
        <!-- slf4j核心包-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${slf4j.version}</version>
            <scope>runtime</scope>
        </dependency>
        <!--核心log4j2jar包-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <!--用于与slf4j保持桥接-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <!--web工程需要包含log4j-web,非web工程不需要-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>${log4j2.version}</version>
            <scope>runtime</scope>
        </dependency>
        <!--需要使用log4j2的AsyncLogger需要包含disruptor-->
        <dependency>
            <groupId>com.lmax</groupId>
            <artifactId>disruptor</artifactId>
            <version>${log4j2.disruptor.version}</version>
        </dependency>
        <!--5.其他-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl.version}</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>${standard.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jsp-api</artifactId>
            <version>${tomcat-jsp-api.version}</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>${commons-fileupload.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>${hibernate-validator.version}</version>
        </dependency>
        <!--shiro依赖-->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>${shiro.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-web</artifactId>
            <version>${shiro.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>${shiro.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>ssm</finalName>
        <resources>
            <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>*.properties</include>
                    <include>*.xml</include>
                </includes>
            </resource>
        </resources>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>${maven.compiler.plugin.version}</version>
                    <configuration>
                        <source>${maven.compiler.source}</source>
                        <target>${maven.compiler.target}</target>
                        <encoding>${project.build.sourceEncoding}</encoding>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <version>1.3.2</version>
                    <dependencies>
                        <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
                        <dependency>
                            <groupId>mysql</groupId>
                            <artifactId>mysql-connector-java</artifactId>
                            <version>${mysql.version}</version>
                        </dependency>
                    </dependencies>
                    <configuration>
                        <overwrite>true</overwrite>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

1.2 generatorConfig.xml

此文件是实现模型代码层的配置,在下面table标签中定义数据库的表与生成的表名

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    <!-- 引入配置文件 -->
    <properties resource="jdbc.properties"/>
    <!--指定数据库jdbc驱动jar包的位置-->
    <classPathEntry location="D:\\tools\\apache-maven-3.5.0-bin\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>
    <!-- 一个数据库一个context -->
    <context id="infoGuardian">
        <!-- 注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>
        <!-- jdbc连接 -->
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage:指定生成的model生成所在的包名 -->
        <!-- targetProject:指定在该项目下所在的路径  -->
        <javaModelGenerator targetPackage="com.Bingzy.model"
                            targetProject="src/main/java">
            <!-- 是否允许子包,即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否针对string类型的字段在set的时候进行trim调用 -->
            <property name="trimStrings" value="false"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法,只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>
        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.Bingzy.mapper"
                         targetProject="src/main/java">
            <!-- 是否允许子包,即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>
        <!-- 03 生成XxxMapper接口 -->
        <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
        <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
        <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
        <javaClientGenerator targetPackage="com.Bingzy.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>
        <!-- 配置表信息 -->
        <!-- schema即为数据库名 -->
        <!-- tableName为对应的数据库表 -->
        <!-- domainObjectName是要生成的实体类 -->
        <!-- enable*ByExample是否生成 example类 --><!--<table schema="" tableName="t_book" domainObjectName="Book"-->
        <!--enableCountByExample="false" enableDeleteByExample="false"-->
        <!--enableSelectByExample="false" enableUpdateByExample="false">-->
        <!--&lt;!&ndash; 忽略列,不生成bean 字段 &ndash;&gt;-->
        <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
        <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
        <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
        <table schema="" tableName="t_mvc_book" domainObjectName="Tbook"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
    </context>
</generatorConfiguration>

1.3 jdbc.properties

建立数据库连接

1.4 log4j2.xml:

日志文件

<?xml version="1.0" encoding="UTF-8"?>
<!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR 
  < FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间,单位是s,最小是5s. -->
<Configuration status="WARN" monitorInterval="30">
  <Properties>
    <!-- 配置日志文件输出目录 ${sys:user.home} -->
    <Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property>
    <property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property>
    <property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property>
    <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property>
  </Properties>
  <Appenders>
    <!--这个输出控制台的配置 -->
    <Console name="Console" target="SYSTEM_OUT">
      <!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
      <ThresholdFilter level="trace" onMatch="ACCEPT"
        onMismatch="DENY" />
      <!-- 输出日志的格式 -->
      <!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称 
        %m : 日志内容,即 logger.info("message") %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M 
        : 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 -->
      <PatternLayout pattern="${PATTERN}" />
    </Console>
    <!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用 -->
    <!--append为TRUE表示消息增加到指定文件中,false表示消息覆盖指定的文件内容,默认值是true -->
    <File name="log" fileName="logs/test.log" append="false">
      <PatternLayout
        pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
    </File>
    <!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size, 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档 -->
    <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
      filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
      <!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
      <ThresholdFilter level="info" onMatch="ACCEPT"
        onMismatch="DENY" />
      <PatternLayout
        pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
      <Policies>
        <!-- 基于时间的滚动策略,interval属性用来指定多久滚动一次,默认是1 hour。 modulate=true用来调整时间:比如现在是早上3am,interval是4,那么第一次滚动是在4am,接着是8am,12am...而不是7am. -->
        <!-- 关键点在于 filePattern后的日期格式,以及TimeBasedTriggeringPolicy的interval, 日期格式精确到哪一位,interval也精确到哪一个单位 -->
        <!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log -->
        <TimeBasedTriggeringPolicy interval="1"
          modulate="true" />
        <!-- SizeBasedTriggeringPolicy:Policies子节点, 基于指定文件大小的滚动策略,size属性用来定义每个日志文件的大小. -->
        <!-- <SizeBasedTriggeringPolicy size="2 kB" /> -->
      </Policies>
    </RollingFile>
    <RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
      filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
      <ThresholdFilter level="warn" onMatch="ACCEPT"
        onMismatch="DENY" />
      <PatternLayout
        pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
      <Policies>
        <TimeBasedTriggeringPolicy />
        <SizeBasedTriggeringPolicy size="2 kB" />
      </Policies>
      <!-- DefaultRolloverStrategy属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 -->
      <DefaultRolloverStrategy max="20" />
    </RollingFile>
    <RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
      filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
      <ThresholdFilter level="error" onMatch="ACCEPT"
        onMismatch="DENY" />
      <PatternLayout
        pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
      <Policies>
        <!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log -->
        <TimeBasedTriggeringPolicy interval="1"
          modulate="true" />
        <!-- <SizeBasedTriggeringPolicy size="10 MB" /> -->
      </Policies>
    </RollingFile>
  </Appenders>
  <!--然后定义logger,只有定义了logger并引入的appender,appender才会生效 -->
  <Loggers>
    <!--过滤掉spring和mybatis的一些无用的DEBUG信息 -->
    <logger name="org.springframework" level="INFO"></logger>
    <logger name="org.mybatis" level="INFO"></logger>
    <!-- 第三方日志系统 -->
    <logger name="org.springframework" level="ERROR" />
    <logger name="org.hibernate" level="ERROR" />
    <logger name="org.apache.struts2" level="ERROR" />
    <logger name="com.opensymphony.xwork2" level="ERROR" />
    <logger name="org.jboss" level="ERROR" />
    <!-- 配置日志的根节点 -->
    <root level="all">
      <appender-ref ref="Console" />
      <appender-ref ref="RollingFileInfo" />
      <appender-ref ref="RollingFileWarn" />
      <appender-ref ref="RollingFileError" />
    </root>
  </Loggers>
</Configuration>

1.5 spring-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!--spring框架与mybatis整合配置文件的加载到spring的上下文 -->
    <import resource="spring-mybatis.xml"></import>
</beans>

1.6 spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--1) 扫描com.zking.zf及子子孙孙包下的控制器(扫描范围过大,耗时)-->
    <context:component-scan base-package="com.Bingzy"/>
    <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
    <mvc:annotation-driven />
    <!--3) 创建ViewResolver视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- viewClass需要在pom中引入两个包:standard.jar and jstl.jar -->
        <property name="viewClass"
                  value="org.springframework.web.servlet.view.JstlView"></property>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--4) 单独处理图片、样式、js等资源 -->
    <!-- <mvc:resources location="/css/" mapping="/css/**"/>
     <mvc:resources location="/js/" mapping="/js/**"/>
     <mvc:resources location="WEB-INF/images/" mapping="/images/**"/>-->
    <mvc:resources location="/static/" mapping="/static/**"/>
</beans>

1.7 spring-mybatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--1. 注解式开发 -->
    <!-- 注解驱动 -->
    <context:annotation-config/>
    <!-- 用注解方式注入bean,并指定查找范围:com.javaxl.ssm及子子孙孙包-->
    <context:component-scan base-package="com.Bingzy"/>
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--初始连接数-->
        <property name="initialSize" value="20"/>
        <!--最大活动连接数-->
        <property name="maxTotal" value="100"/>
        <!--最大空闲连接数-->
        <property name="maxIdle" value="50"/>
        <!--最小空闲连接数-->
        <property name="minIdle" value="10"/>
        <!--设置为-1时,如果没有可用连接,连接池会一直无限期等待,直到获取到连接为止。-->
        <!--如果设置为N(毫秒),则连接池会等待N毫秒,等待不到,则抛出异常-->
        <property name="maxWaitMillis" value="-1"/>
    </bean>
    <!--4. spring和MyBatis整合 -->
    <!--1) 创建sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 自动扫描XxxMapping.xml文件,**任意路径 -->
        <property name="mapperLocations" value="classpath*:com/Bingzy/**/mapper/*.xml"/>
        <!-- 指定别名 -->
        <property name="typeAliasesPackage" value="com/Bing/**/model"/>
        <!--配置pagehelper插件-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>
    <!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口),并实现这些接口,-->
    <!--   即可直接在程序中使用dao接口,不用再获取sqlsession对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--basePackage 属性是映射器接口文件的包路径。-->
        <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
        <property name="basePackage" value="com/Bing/**/mapper"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <aop:aspectj-autoproxy/>
</beans>

1.8 生成模型层代码

生成类样式:

1.9 导入相关的工具类

创建util包并添加Page Bean类

PageBean类:

专门处理分页

package com.Bingzy.util;
import javax.servlet.http.HttpServletRequest;
import java.io.Serializable;
import java.util.Map;
public class PageBean implements Serializable {
  private static final long serialVersionUID = 2422581023658455731L;
  //页码
  private int page=1;
  //每页显示记录数
  private int rows=10;
  //总记录数
  private int total=0;
  //是否分页
  private boolean isPagination=true;
  //上一次的请求路径
  private String url;
  //获取所有的请求参数
  private Map<String,String[]> map;
  public PageBean() {
    super();
  }
  //设置请求参数
  public void setRequest(HttpServletRequest req) {
    String page=req.getParameter("page");
    String rows=req.getParameter("rows");
    String pagination=req.getParameter("pagination");
    this.setPage(page);
    this.setRows(rows);
    this.setPagination(pagination);
    this.url=req.getContextPath()+req.getServletPath();
    this.map=req.getParameterMap();
  }
  public String getUrl() {
    return url;
  }
  public void setUrl(String url) {
    this.url = url;
  }
  public Map<String, String[]> getMap() {
    return map;
  }
  public void setMap(Map<String, String[]> map) {
    this.map = map;
  }
  public int getPage() {
    return page;
  }
  public void setPage(int page) {
    this.page = page;
  }
  public void setPage(String page) {
    if(null!=page&&!"".equals(page.trim()))
      this.page = Integer.parseInt(page);
  }
  public int getRows() {
    return rows;
  }
  public void setRows(int rows) {
    this.rows = rows;
  }
  public void setRows(String rows) {
    if(null!=rows&&!"".equals(rows.trim()))
      this.rows = Integer.parseInt(rows);
  }
  public int getTotal() {
    return total;
  }
  public void setTotal(int total) {
    this.total = total;
  }
  public void setTotal(String total) {
    this.total = Integer.parseInt(total);
  }
  public boolean isPagination() {
    return isPagination;
  }
  public void setPagination(boolean isPagination) {
    this.isPagination = isPagination;
  }
  public void setPagination(String isPagination) {
    if(null!=isPagination&&!"".equals(isPagination.trim()))
      this.isPagination = Boolean.parseBoolean(isPagination);
  }
  /**
   * 获取分页起始标记位置
   * @return
   */
  public int getStartIndex() {
    //(当前页码-1)*显示记录数
    return (this.getPage()-1)*this.rows;
  }
  /**
   * 末页
   * @return
   */
  public int getMaxPage() {
    int totalpage=this.total/this.rows;
    if(this.total%this.rows!=0)
      totalpage++;
    return totalpage;
  }
  /**
   * 下一页
   * @return
   */
  public int getNextPage() {
    int nextPage=this.page+1;
    if(this.page>=this.getMaxPage())
      nextPage=this.getMaxPage();
    return nextPage;
  }
  /**
   * 上一页
   * @return
   */
  public int getPreivousPage() {
    int previousPage=this.page-1;
    if(previousPage<1)
      previousPage=1;
    return previousPage;
  }
  @Override
  public String toString() {
    return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination
        + "]";
  }
}

创建一个aspect包并添加pageAspect类:

该是切面类专门来做分页

package com.Bingzy.aspect;
import com.Bingzy.util.PageBean;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
/**
 * @Name BingBing
 * @company zking cy
 * @create 2023-08-25-18:37
 */
@Aspect//代表当前类为切面类
@Component//代表当前类交给Spring进行管理
public class PageAspect {
    @Around("execution(* *..*Biz.*Page(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        PageBean pageBean =null;
           //获取目标方法中的所有参数
        Object[] arg = args.getArgs();
        for (Object param : arg){
          if(param instanceof  PageBean){
          pageBean= (PageBean) param;
          break;
      }
        }
        if (pageBean != null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(), pageBean.getRows());
        //执行目标方法
         Object lst=  args.proceed();
            if (pageBean != null && pageBean.isPagination()) {
                PageInfo  info = new PageInfo ((List) lst);
                pageBean.setTotal((int) info.getTotal());
        }
            return lst;
    }
}

二、controller层代码编写

创建一个web包并定义controller类

package com.Bingzy.web;
import com.Bingzy.Biz.TbookBiz;
import com.Bingzy.model.Tbook;
import com.Bingzy.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
/**
 * @Name BingBing
 * @company zking cy
 * @create 2023-09-08-19:51
 */
@Controller
@RequestMapping("/book")
public class TbookController {
    @Autowired
    private TbookBiz tbookBiz;
    @RequestMapping("/list")
    //查询
    public String list(Tbook tbook, HttpServletRequest request){
        PageBean pageBean =new PageBean();
        pageBean.setRequest(request);
        List<Tbook> tbookList = tbookBiz.listPager(tbook, pageBean);
        request.setAttribute("lst",tbookList);
        request.setAttribute("pageBean",pageBean);
        return  "book/list";
    }
    //增加
    //    增
    @RequestMapping("/add")
    public String add(Tbook tbook){
        tbookBiz.insertSelective(tbook);
        return "redirect:list";
    }
    //    删
    @RequestMapping("/del")
    public String del(Tbook tbook){
        tbookBiz.deleteByPrimaryKey(tbook.getBid());
        return "redirect:list";
    }
    //    改
    @RequestMapping("/edit")
    public String edit(Tbook tbook){
        tbookBiz.updateByPrimaryKeySelective(tbook);
        return "redirect:list";
    }
    //    模糊分页查询
    @RequestMapping("/PreSave")
    public String PreSave(Tbook tbook, HttpServletRequest request){
        if(tbook!=null && tbook.getBid()!=null){
            Tbook s = tbookBiz.selectByPrimaryKey(tbook.getBid());
            request.setAttribute("b",s);
        }
        return "book/edit";
    }
}

三,分页代码与前端代码

3.1 分页代码

3.1.1 PageTag

package com.Bingzy.tag;
import com.Bingzy.util.PageBean;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
public class PageTag extends BodyTagSupport{
  private PageBean pageBean;// 包含了所有分页相关的元素
  public PageBean getPageBean() {
    return pageBean;
  }
  public void setPageBean(PageBean pageBean) {
    this.pageBean = pageBean;
  }
  @Override
  public int doStartTag() throws JspException {
//    没有标签体,要输出内容
    JspWriter out = pageContext.getOut();
    try {
      out.print(toHTML());
    } catch (IOException e) {
      e.printStackTrace();
    }
    return super.doStartTag();
  }
  private String toHTML() {
    StringBuffer sb = new StringBuffer();
//    隐藏的form表单---这个就是上一次请求下次重新发的奥义所在
//    上一次请求的URL
    sb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>");
    sb.append(" <input type='hidden' name='page'>");
//    上一次请求的参数
    Map<String, String[]> paramMap = pageBean.getMap();
    if(paramMap != null && paramMap.size() > 0) {
      Set<Entry<String, String[]>> entrySet = paramMap.entrySet();
      for (Entry<String, String[]> entry : entrySet) {
//        参数名
        String key = entry.getKey();
//        参数值
        for (String value : entry.getValue()) {
//          上一次请求的参数,再一次组装成了新的Form表单
//          注意:page参数每次都会提交,我们需要避免
          if(!"page".equals(key)) {
            sb.append(" <input type='hidden' name='"+key+"' value='"+value+"' >");
          }
        }
      }
    }
    sb.append("</form>");
//    分页条
    sb.append("<ul class='pagination justify-content-center'>");
    sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
    sb.append(" href='javascript:gotoPage(1)'>首页</a></li>");
    sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
    sb.append(" href='javascript:gotoPage("+pageBean.getPreivousPage()+")'>&lt;</a></li>");// less than 小于号
//    sb.append(" <li class='page-item'><a class='page-link' href='#'>1</a></li>");
//    sb.append(" <li class='page-item'><a class='page-link' href='#'>2</a></li>");
    sb.append(" <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>");
    sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getNextPage()+")'>&gt;</a></li>");
    sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.getMaxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.getMaxPage() +")'>尾页</a></li>");
    sb.append(" <li class='page-item go-input'><b>到第</b><input class='page-link'");
    sb.append(" type='text' id='skipPage' name='' /><b>页</b></li>");
    sb.append(" <li class='page-item go'><a class='page-link'");
    sb.append(" href='javascript:skipPage()'>确定</a></li>");
    sb.append(" <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>");
    sb.append("</ul>");
//    分页执行的JS代码
    sb.append("<script type='text/javascript'>");
    sb.append(" function gotoPage(page) {");
    sb.append("   document.getElementById('pageBeanForm').page.value = page;");
    sb.append("   document.getElementById('pageBeanForm').submit();");
    sb.append(" }");
    sb.append(" function skipPage() {");
    sb.append("   var page = document.getElementById('skipPage').value;");
    sb.append("   if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.getMaxPage()+") {");
    sb.append("     alert('请输入1~"+pageBean.getMaxPage()+"的数字');");
    sb.append("     return;");
    sb.append("   }");
    sb.append("   gotoPage(page);");
    sb.append(" }");
    sb.append("</script>");
    return sb.toString();
  }
}

3.1.2 zking.tld

<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0">
  <description>zking 1.1 core library</description>
  <display-name>zking core</display-name>
  <tlib-version>1.1</tlib-version>
  <short-name>zking</short-name>
  <uri>http://jsp.veryedu.cn</uri>
  <tag>
    <name>page</name>
    <tag-class>com.Bingzy.tag.PageTag</tag-class>
    <body-content>JSP</body-content>
    <attribute>
        <name>pageBean</name>
        <required>true</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
  </tag>
</taglib>

3.2 前端代码

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%> 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link
  href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
  rel="stylesheet">
<script
  src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>博客列表</title>
<style type="text/css">
.page-item input {
  padding: 0;
  width: 40px;
  height: 100%;
  text-align: center;
  margin: 0 6px;
}
.page-item input, .page-item b {
  line-height: 38px;
  float: left;
  font-weight: 400;
}
.page-item.go-input {
  margin: 0 10px;
}
</style>
</head>
<body>
<form class="form-inline"
    action="${pageContext.request.contextPath }/book/list" method="post">
  <div class="form-group mb-2">
    <input type="text" class="form-control-plaintext" name="bname"
         placeholder="请输入学生名称">
    <!--      <input name="rows" value="20" type="hidden"> -->
    <!-- 不想分页 -->
    <%--<input name="pagination" value="false" type="hidden">--%>
  </div>
  <button type="submit" class="btn btn-primary mb-2">查询</button>
  <a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/book/PreSave">新增</a>
</form>
<table class="table table-striped ">
  <thead>
  <tr>
    <th scope="col">书籍ID</th>
    <th scope="col">书籍名称</th>
    <th scope="col">操作</th>
  </tr>
  </thead>
  <tbody>
  <c:forEach  var="b" items="${lst }">
    <tr>
      <td>${b.bid }</td>
      <td>${b.bname }</td>
      <td>
        <a href="${pageContext.request.contextPath }/book/PreSave?bid=${b.bid}">修改</a>
        <a href="${pageContext.request.contextPath }/book/del?bid=${b.bid}">删除</a>
      </td>
    </tr>
  </c:forEach>
  </tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
${pageBean }
${slist}
</body>
</html>

edit.jsp

增加与修改都是同一个界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>博客的编辑界面</title>
</head>
<body>
<center>
    编辑界面
    <form action="${pageContext.request.contextPath }/${empty b ? 'book/add' : 'book/edit'}" method="post">
        书籍id:<input type="text" name="bid" value="${b.bid }"><br>
        书籍名称:<input type="text" name="bname" value="${b.bname }"><br>
        <input type="submit">
    </form>
</center>
</body>
</html>

四,案例测试(CRUD)

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