回顾SpringMVC-04

本章咱就整合SSM，话不多说，上代码

环境要求

环境：

IDEAMySQL5.7Tomcat8Maven3.6

数据库

创建数据库

CREATE TABLE `user` ( `id` int(20) NOT NULL, `name` varchar(30) DEFAULT NULL, `pwd` varchar(30) DEFAULT NULL, `perms` varchar(100) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 insert into `user`(`id`,`name`,`pwd`,`perms`) values (1,'马云','123456',NULL), (2,'aaa','123213',NULL), (3,'李四','1z1z1z',NULL), (4,'半仙','123355',NULL), (5,'大仙','123255',NULL), (6,'小仙','222255',NULL), (7,'李武','546552',NULL), (8,'刘霸','555599',NULL); --数据仅供参考，无真实对应

基本环境搭建

打开IDEA，创建一个Maven项目，取名看自己了，添加web支持

导入pom.xml中的依赖主要有

pom.xml

<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!--Mybatis--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.4</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> </dependency> </dependencies>

别忘了加入资源过滤

<resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources>

建立基本目录结构

创建包，Controller，service，dao，实体类

com.feng.controller

com.feng.dao

com.feng.pojo

com.feng.service

配置文件

spring主配置文件

applicationContext.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" 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-4.2.xsd"> <import resource="classpath:spring-dao.xml"/> <import resource="classpath:spring-service.xml"/> <import resource="classpath:spring-mvc.xml"/> </beans>

里面导入的三个resource

spring-dao.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 1、关联数据库配置文件 --> <context:property-placeholder location="classpath:db.properties"/> <!--2、连接池 dbcp:半自动化操作，不能自动连接， c3p0:自动化操作（自动化加载配置文件，并且可以自动设置到对象中！） druid://hikari: --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!--3、sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!--绑定Mybatis的配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!--4、配置dao接口扫描包，动态的实现了dao接口可以注入到Spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!--要扫描的dao包--> <property name="basePackage" value="com.feng.dao"/> </bean> </beans>

spring-service.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--1.扫描service下的包--> <context:component-scan base-package="com.feng.service"/> <!--2.将我们所有的业务类注入到Spring，可以通过配置，或者注解实现--> <bean id="UserServiceImpl" class="com.feng.service.UserServiceImpl"> <property name="userDao" ref="userDao"/> </bean> <!--3.声明式事务配置--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!--注入数据源--> <property name="dataSource" ref="dataSource"/> </bean> <!--4.AOP事务支持--> </beans>

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" 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-4.2.xsd"> <context:component-scan base-package="com.feng.controller"/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver"> <!--前缀--> <property name="prefix" value="/WEB-INF/jsp/"/> <!--后缀--> <property name="suffix" value=".jsp"/> </bean> </beans>

mybatis配置文件

mybatis.properties

这里根据自己的数据库名和表来，账号密码一样自己来

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=*****

mybatis核心配置文件

Mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <properties resource="db.properties"></properties> <typeAliases> <typeAlias type="com.feng.pojo.User" alias="User"/> </typeAliases> <environments default="development"> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="${jdbc.driver}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/feng/dao/UserMapper.xml"/> </mappers> </configuration>

Mybatis层编写

com.feng.pojo.User

User.java

package com.feng.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class User { private int id; private String name; private String pwd; }

这里用了lombok插件，没有的话就自己写一下get、set、有参无参

编写Dao层的Mapper接口

UserDao.java

package com.feng.dao; import com.feng.pojo.User; import java.util.List; public interface UserDao { //查询所有 List<User> findAll(); //根据id查人 User getUserById(int id); //模糊搜索 List<User> getUserLike(String value); //增加用户 int addUser(User user); int insertTest(User user); //更新用户 int updateUser(User user); //删除用户 int deleteUser(int id); //根据名字查询用户 User queryUserByName(String name); }

根据UserDao的Mapper接口编写对应的Mapper文件

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!--namespace=绑定一个对应的Dao/Mapper接口--> <mapper namespace="com.feng.dao.UserDao"> <!-- 查询所用用户并且封装到List id：和接口中的方法名一致 resultType：和返回值的全限定名一致 parameterType和传入的类型一致 --> <select id="findAll" resultType="User"> select * from mybatis.user </select> <select id="getUserById" parameterType="int" resultType="User"> select * from mybatis.user where id = #{id} </select> <select id="getUserLike" resultType="User"> select * from mybatis.user where name like "%"#{value}"%" </select> <insert id="addUser" parameterType="User"> insert into mybatis.user (id,name,pwd) values (#{id},#{name},#{pwd}) </insert> <!-- 若希望通过原有主键 Id+1 的方式实现生成主键Id则实现如下--> <insert id="insertTest" useGeneratedKeys="true" keyProperty="id" parameterType="User"> <selectKey keyProperty="id" resultType="int" order="BEFORE"> SELECT MAX(id) +1 AS id From mybatis.user </selectKey> INSERT INTO mybatis.user (id,name,pwd) VALUE (#{id},#{name},#{pwd}) </insert> <update id="updateUser" parameterType="User"> update mybatis.user set name=#{name},pwd=#{pwd} where id=#{id} </update> <delete id="deleteUser" parameterType="int"> delete from mybatis.user where id=#{id} </delete> <select id="queryUserByName" resultType="User"> select * from mybatis.user where name =#{name} </select> </mapper>

编写Service层的接口和实现类

UserService.java

package com.feng.service; import com.feng.pojo.User; import java.util.List; public interface UserService { List<User> findAll(); User getUserById(int id); List<User> getUserLike(String value); int addUser(User user); int updateUser(User user); int deleteUser(int id); User queryUserByName(String name); }

实现类

UserServiceImpl.java

package com.feng.service; import com.feng.dao.UserDao; import com.feng.pojo.User; import java.util.List; public class UserServiceImpl implements UserService { private UserDao userDao; public void setUserDao(UserDao userDao) { this.userDao = userDao; } @Override public List<User> findAll() { //System.out.println("业务层查询所有的user...."); return userDao.findAll(); } @Override public User getUserById(int id) { return userDao.getUserById(id); } @Override public List<User> getUserLike(String name) { return userDao.getUserLike(name); } @Override public int addUser(User user) { return userDao.addUser(user); } @Override public int updateUser(User user) { return userDao.updateUser(user); } @Override public int deleteUser(int id) { return userDao.deleteUser(id); } @Override public User queryUserByName(String name) { return userDao.queryUserByName(name); } }

到这里底层就完毕了

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_4_0.xsd" version="4.0"> <!--DispatcherServlet--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--乱码过滤--> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <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> <!--Session--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>

最后写业务类

业务类

UserController.java

package com.feng.controller; /* web层 User */ import com.feng.pojo.User; import com.feng.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import java.util.ArrayList; import java.util.List; @Controller @RequestMapping("/user") public class UserController { //controller层调用service层 @Autowired @Qualifier("UserServiceImpl") private UserService userService; //查询全部（展示全部 @RequestMapping("/allUser") public String list(Model model){ List<User> list = userService.findAll(); model.addAttribute("list",list); return "allUser"; } //查询用户 @RequestMapping("/queryUser") public String queryUser(String queryUserName,Model model){ User user = userService.queryUserByName(queryUserName); List<User> list = new ArrayList<>(); list.add(user); if(user==null){ list = userService.findAll(); model.addAttribute("error","未查到结果"); } model.addAttribute("list",list); return "allUser"; } //模糊查询实现 @RequestMapping("/getUserLike") public String getUserLike(String LikeName,Model model){ List<User> list = userService.getUserLike(LikeName); model.addAttribute("list",list); return "allUser"; } //跳转到增加用户界面 @RequestMapping("/toAddUser") public String toAddPage(){ return "addUser"; } //添加用户的请求 @RequestMapping("/addUser") public String addUser(User user){ System.out.println("addUser--->"+user); userService.addUser(user); return "redirect:/user/allUser"; } //跳转到修改页面 @RequestMapping("/toUpdate") public String toUpdate(int id,Model model){ User user = userService.getUserById(id); model.addAttribute("user",user); return "updateUser"; } //修改用户 @RequestMapping("/updateUser") public String updateUser(User user){ System.out.println("updateUser-->"+user); userService.updateUser(user); return "redirect:/user/allUser"; } //删除用户 @RequestMapping("/del/{id}") public String deleteUser(@PathVariable("id") int id){ userService.deleteUser(id); return "redirect:/user/allUser"; } }

前端页面

index.jsp

<%-- Created by IntelliJ IDEA. User: 16979 Date: 2020/4/18 Time: 10:43 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <!DOCTYPE HTML> <html> <head> <title>首页</title> <style type="text/css"> a { text-decoration: none; color: black; font-size: 18px; } h3 { width: 180px; height: 38px; margin: 100px auto; text-align: center; line-height: 38px; background: deepskyblue; border-radius: 4px; } </style> </head> <body> <h3> <a href="${pageContext.request.contextPath}/user/allUser">点击进入列表页</a> </h3> </body> </html>

allUser.jsp

显示用户的页面

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: 16979 Date: 2020/4/18 Time: 13:15 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>用户展示</title> <meta name="viewport" content="width=device-width,initial-scal=1.0"> <%-- 引入Bootstrap,美化界面--%> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1>用户列表——显示所有用户</h1> </div> </div> </div> <div class="row"> <div class="col-md-4 colunm"> <%--toAddBook--%> <a class="btn btn-primary" href="${pageContext.request.contextPath}/user/toAddUser">新增用户</a> <a class="btn btn-primary" href="${pageContext.request.contextPath}/user/allUser">显示全部用户</a> </div> <div class="col-md-8 colunm"> <%--查询用户--%> <form class="form-inline" action="${pageContext.request.contextPath}/user/queryUser" method="post" style="float: right" class="form-inline"> <span style="color: red;font-weight: bold">${error}</span> <input type="text" name="queryUserName" class="form-control" placeholder="请输入要查询的用户名称"> <input type="submit" value="查询" class="btn btn-primary"> </form> </div> </div> <div class="row"> <div class="col-md-4 colunm"> </div> <div class="col-md-8 colunm"> <%--查询用户--%> <form class="form-inline" action="${pageContext.request.contextPath}/user/getUserLike" method="post" style="float: right" class="form-inline"> <span style="color: red;font-weight: bold">${error}</span> <input type="text" name="LikeName" class="form-control" placeholder="请输入要查询的用户名称"> <input type="submit" value="模糊查询" class="btn btn-primary"> </form> </div> </div> <div class="row clearfix"> <div class="col-ma-12 column"> <table class="table table-hover table-striped"> <thread> <tr> <th>用户编号</th> <th>用户名字</th> <th>用户密码</th> <th>操作</th> </tr> </thread> <tbody> <c:forEach var="user" items="${requestScope.get('list')}"> <tr> <td>${user.getId()}</td> <td>${user.getName()}</td> <td>${user.getPwd()}</td> <td> <a href="${pageContext.request.contextPath}/user/toUpdate?id=${user.getId()}">更改</a>   |   <a href="${pageContext.request.contextPath}/user/del/${user.getId()}">删除</a> </td> </tr> </c:forEach> </tbody> </table> </div> </div> </div> </body> </html>

addUser.jsp

<%-- Created by IntelliJ IDEA. User: 16979 Date: 2020/5/26 Time: 12:14 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> <%-- 引入Bootstrap,美化界面--%> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1>新增用户</h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/user/addUser"method="post"> 用户ID：<input type="text" name="id" required><br><br><br> 用户名称：<input type="text" name="name" required><br><br><br> 用户密码：<input type="text" name="pwd" required><br><br><br> <input type="submit" value="添加"> </form> </div> </body> </html>

updateUser.jsp

<%-- Created by IntelliJ IDEA. User: 16979 Date: 2020/5/26 Time: 12:48 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1>修改用户</h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/user/updateUser"method="post"> <input type="hidden" name="id" value="${user.getId()}"/> 用户名称：<input type="text" name="name" value="${user.getName()}" required><br><br><br> 用户密码：<input type="text" name="pwd" value="${user.getPwd()}" required><br><br><br> <input type="submit" value="修改"> </form> </div> </body> </html>

结构一览图

完事儿

最后启动tomcat，运行~

主页

用户列表

普通查询

模糊查询

更新用户