SprimgMVC增删改查·-阿里云开发者社区

1.项目创建

在IDEA创建一个maven项目

2.项目依赖

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example</groupId>
    <artifactId>lzxzyssm</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>lzxzyssmMaven Webapp</name>
    <url>http://maven.apache.org</url>
    <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>${junit.version}</version>
            <!--<scope>test</scope>&lt;!&ndash;&ndash;&gt;-->
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${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>${shiro.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>lzxzyssm</finalName>
        <resources>
            <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>*.properties</include>
                    <include>*.xml</include>
                </includes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${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>
    </build>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <display-name>Archetype Created Web Application</display-name>
    <!-- Spring和web项目集成start -->
    <!-- spring上下文配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-context.xml</param-value>
    </context-param>
    <!-- 读取Spring上下文的监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- Spring和web项目集成end -->
    <!-- 中文乱码处理 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--此参数可以不配置，默认值为：/WEB-INF/springmvc-servlet.xml-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <!--web.xml 3.0的新特性，是否支持异步-->
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

3.配置文件

generatorConfig.xml

<?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 maven里面 -->
    <classPathEntry
            location="D:\\temp\\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 targetProject="src/main/java" targetPackage="com.liao.model">
            <!-- 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 targetProject="src/main/java" targetPackage="com.liao.mapper">
            <!-- 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 targetProject="src/main/java" targetPackage="com.liao.mapper" 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"/>
        <table schema="" tableName="t_struts_class" domainObjectName="StrutsClas"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
    </context>
</generatorConfiguration>

数据库配置文件： jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

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.liao"/>
    <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="10"/>
        <!--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/liao/**/mapper/*.xml"/>
        <!-- 指定别名 -->
        <property name="typeAliasesPackage" value="com/liao/**/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/liao/**/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>

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整合配置文夹加载到spring上下文中-->
    <import resource="spring-mybatis.xml"></import>
</beans>

spring-mvc-xml:

<?xml version="1.0" encoding="UTF-8"?>
<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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns="http://www.springframework.org/schema/beans"
       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
      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.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.liao"/>
    <!--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="/static/" mapping="/static/**"/>-->
    <!--处理controller层发送请求到biz，会经过切面的拦截处理-->
    <aop:aspectj-autoproxy/>
</beans>

4.后端代码

分页功能

PageBean

package com.liao.utils;
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
        + "]";
  }
}

PageTag

package com.liao.tag;
import com.liao.utils.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='get'>");
    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();
  }
}

tld

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

编写业务逻辑层（增删改查方法）

在UserMapper.xml中新建一条查询sql

  <select id="listPager" resultMap="BaseResultMap" parameterType="com.liao.model.User" >
    select
    <include refid="Base_Column_List" />
    from t_oa_user
    <where>
      <if test="name!=null">
        and name like concat('%',#{name},'%')
      </if>
    </where>
  </select>

UserMapper接口方法

List<User> listPager(User user);

业务逻辑层接口

package com.liao.biz;
import com.liao.model.User;
import com.liao.utils.PageBean;
import java.util.List;
public interface UserBiz {
    int deleteByPrimaryKey(Long id);
    int insert(User record);
    int insertSelective(User record);
    User selectByPrimaryKey(Long id);
    int updateByPrimaryKeySelective(User record);
    int updateByPrimaryKey(User record);
    List<User> listPager(User user, PageBean page);
}

实现接口

package com.liao.biz.impl;
import com.liao.biz.UserBiz;
import com.liao.mapper.UserMapper;
import com.liao.model.User;
import com.liao.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserBizImpl implements UserBiz {
    @Autowired
    private UserMapper userMapper;
    @Override
    public int deleteByPrimaryKey(Long id) {
        return userMapper.deleteByPrimaryKey(id);
    }
    @Override
    public int insert(User record) {
        return userMapper.insert(record);
    }
    @Override
    public int insertSelective(User record) {
        return userMapper.insertSelective(record);
    }
    @Override
    public User selectByPrimaryKey(Long id) {
        return userMapper.selectByPrimaryKey(id);
    }
    @Override
    public int updateByPrimaryKeySelective(User record) {
        return userMapper.updateByPrimaryKeySelective(record);
    }
    @Override
    public int updateByPrimaryKey(User record) {
        return userMapper.updateByPrimaryKey(record);
    }
    @Override
    public List<User> listPager(User user, PageBean page) {
        return userMapper.listPager(user);
    }
}

.编写切面

package com.liao.aspect;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liao.utils.PageBean;
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;
@Aspect
@Component 
public class PageAspect {
    @Around("execution(* *..*Biz.*Pager(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        PageBean pageBean = null;
        Object[] args1 = args.getArgs();
        for (Object param:args1) {
            if (param instanceof PageBean){
                pageBean = (PageBean) param;
                break;
            }
        }
        if(pageBean!=null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        Object proceed = args.proceed();
        if(pageBean!=null && pageBean.isPagination()){
            PageInfo info = new PageInfo((List) proceed);
            pageBean.setTotal((int) info.getTotal());
        }
        return proceed;
    }
}

web层控制器

package com.liao.web;
import com.liao.biz.UserBiz;
import com.liao.model.User;
import com.liao.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
/**
 * @author 云村小威
 * @site blog.csdn.net/Justw320
 * @create 2023-09-08 11:56
 */
@Controller
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserBiz userBiz;
    /*新增方法*/
    @RequestMapping("/add")
    public String save(User user, HttpServletRequest request) {
        userBiz.insertSelective(user);
        return "redirect:list";
    }
    /*删除方法*/
    @RequestMapping("/del/{id}")
    public String del(@PathVariable("id") Long id, HttpServletRequest request) {
        userBiz.deleteByPrimaryKey(id);
        return "redirect:/users/list";
    }
    /*修改方法*/
    @RequestMapping("/edit")
    public String edit(User user, HttpServletRequest request) {
        userBiz.updateByPrimaryKeySelective(user);
        return "redirect:list";
    }
    /*查询方法*/
    @GetMapping("/list")
    public ModelAndView list(User user, HttpServletRequest request) {
        PageBean pageBean = new PageBean();
        pageBean.setRequest(request);
        List<User> users = userBiz.listPager(user, pageBean);
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("users", users);
        modelAndView.addObject("pageBean", pageBean);
        modelAndView.setViewName("user/list");
        return modelAndView;
    }
    /*数据回显*/
    @RequestMapping("/preSave")
    public String preSave(User user, HttpServletRequest request) {
        if (user != null && user.getId() != null && user.getId() != 0) {
            User u = userBiz.selectByPrimaryKey(user.getId());
            request.setAttribute("u", u);
        }
        return "user/edit";
    }
}

5.前端代码

list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="z" uri="http://jsp.veryedu.cn" %>
<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>
    <base href="${pageContext.request.contextPath }">
    <title>博客列表</title>
    <style type="text/css">
        .page-item input {
            padding: 0;
            width: 40px;
            height: 100%;
            text-align: center;
            margin: 0 6px;
        }
        .page-item input, .page-item b {
            line-height: 38px;
            float: left;
            font-weight: 400;
        }
        .page-item.go-input {
            margin: 0 10px;
        }
    </style>
</head>
<body>
<form class="form-inline"
      action="/users/list" method="post">
    <div class="form-group mb-2">
        <input type="text" class="form-control-plaintext" name="name"
               placeholder="请输入用户名称">
        <!-- 不想分页 -->
        <!-- <input name="rows" value="20" type="hidden"> -->
        <%--<input name="pagination" value="false" type="hidden">--%>
    </div>
    <button type="submit" class="btn btn-primary mb-2">查询</button>
    <a class="btn btn-primary mb-2" href="/users/preSave">新增</a>
</form>
<table class="table table-striped">
    <thead>
    <tr>
        <th scope="col">用户ID</th>
        <th scope="col">用户名</th>
        <th scope="col">账号</th>
        <th scope="col">密码</th>
        <th scope="col">权限</th>
    </tr>
    </thead>
    <tbody>
    <c:forEach var="u" items="${users }">
        <tr>
            <td>${u.id }</td>
            <td>${u.name }</td>
            <td>${u.loginname }</td>
            <td>${u.pwd }</td>
            <td>${u.rid }</td>
            <td>
                <a href="/users/preSave?id=${u.id}">修改</a>
                <a href="/users/del/${u.id}">删除</a>
            </td>
        </tr>
    </c:forEach>
    </tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
</body>
</html>

edit.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用户编辑、新增公共页面</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/${empty u ? 'users/add' : 'users/edit'}" method="post">
    用户id:<input type="text" name="id" value="${u.id }"><br>
    用户名:<input type="text" name="name" value="${u.name }"><br>
    账号:<input type="text" name="loginname" value="${u.loginname }"><br>
    密码:<input type="text" name="pwd" value="${u.pwd }"><br>
    权限:<input type="text" name="rid" value="${u.rid }"><br>
    <input type="submit">
</form>
</body>
</html>

SprimgMVC增删改查·

1.项目创建

2.项目依赖

3.配置文件

4.后端代码

分页功能

编写业务逻辑层（增删改查方法）

5.前端代码

热门文章

最新文章

相关课程

相关电子书

相关实验场景