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>${junit.version}</version> <!--<scope>test</scope><!––>--> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${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()+")'><</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()+")'>></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>