利用idea创建一个基本的smm项目（带增删改查）
环境 idea jdk1.8 tomcat mysql
打开idea选择创建一个maven项目
然后点击next，next，finsh
然后看项目的结构
如图所示
接着创建com包，再在com包下新建四个包，分别命名为：
自定义pom.xml
<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.li</groupId> <artifactId>ssm_test_2</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm_test_2 Maven Webapp</name> <!-- 用来设置版本号 --> <properties> <srping.version>4.0.2.RELEASE</srping.version> <mybatis.version>3.2.8</mybatis.version> <slf4j.version>1.7.12</slf4j.version> <log4j.version>1.2.17</log4j.version> <druid.version>1.0.9</druid.version> </properties> <!-- 用到的jar包 --> <dependencies> <!-- servlet依赖的jar包start --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> </dependency> <!-- servlet依赖的jar包start --> <!-- jsp依赖jar包start --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.1</version> </dependency> <!-- 单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示开发的时候引入，发布的时候不会加载此包 --> <scope>test</scope> </dependency> <!-- spring框架包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${srping.version}</version> </dependency> <!-- spring框架包 --> <!-- mybatis框架包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.2</version> </dependency> <!-- mybatis框架包 --> <!-- 数据库驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version> </dependency> <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> </dependency> <!-- jstl标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- 连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> </dependencies> <build> <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 --> <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> <!-- java编译插件,如果maven的设置里配置好jdk版本就不用 --> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build> </project>
在resource包下新建Directory:mapper(用来放xxMapper.xml)
添加jdbc.properties和lo4j.properties文件
jdbc.properties
driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/test
username=root
password=123456
initialSize=0
maxActive=20
maxIdle=20
minIdle=1
maxWait=60000lo4j.properties文件
log4j.rootLogger=DEBUG,CONSOLE,file
#log4j.rootLogger=ERROR,ROLLING_FILE
log4j.logger.com.qhit.dao=debug
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug
log4j.logger.java.sql.ResultSet=debug
log4j.logger.org.tuckey.web.filters.urlrewrite.UrlRewriteFilter=debug
######################################################################################
# Console Appender 日志在控制输出配置
######################################################################################
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=error
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n
######################################################################################
# DailyRolling File 每天产生一个日志文件，文件名格式:log2009-09-11
######################################################################################
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.DatePattern=yyyy-MM-dd
log4j.appender.file.File=log.log
log4j.appender.file.Append=true
log4j.appender.file.Threshold=error
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-M-d HH:mm:ss}%x[%5p](%F:%L) %m%n
log4j.logger.com.opensymphony.xwork2=error
然后创建applicationContext.xm
<?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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 加载properties文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties"/> </bean> <!-- 配置数据源 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${password}"/> </bean> <!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 扫描model包 --> <property name="typeAliasesPackage" value="com.lwy.pojo"/> <!-- 扫描sql配置文件:mapper需要的xml文件--> <property name="mapperLocations" value="classpath:mapper/*.xml"/> </bean> <!-- Mapper动态代理开发，扫描dao接口包--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 给出需要扫描Dao接口包 --> <property name="basePackage" value="com.lwy.mapper"/> </bean> <!-- 事务管理 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!--数据库连接池--> <property name="dataSource" ref="dataSource"/> </bean> </beans>
创建sping-mvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 扫描注解，这样com.xjt包下的文件都能被扫描 --> <context:component-scan base-package="com.lwy"/> <!-- 开启SpringMVC注解模式 --> <mvc:annotation-driven/> <!-- 静态资源默认servlet配置 --> <mvc:default-servlet-handler/> <!-- 配置返回视图的路径，以及识别后缀是jsp文件 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
接着在webapp下WEB-INF配置web.xml
<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>mvcDemo</display-name> <welcome-file-list> <welcome-file>/pages/index.jsp</welcome-file> </welcome-file-list> <!-- 注册ServletContext监听器，创建容器对象，并且将ApplicationContext对象放到Application域中 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 指定spring核心配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!-- 解决乱码的过滤器 --> <filter> <filter-name>CharacterEncodingFilter</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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 配置前端控制器 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 指定配置文件位置和名称 如果不设置,默认找/WEB-INF/<servlet-name>-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> <async-supported>true</async-supported> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
数据库创建一个表
DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` varchar(200) NOT NULL, `name` varchar(200) CHARACTER SET utf8 NOT NULL, `pwd` varchar(200) CHARACTER SET utf8 NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
可以先添加数据方便测试
INSERT INTO `user` VALUES ('2', '22', '44'); INSERT INTO `user` VALUES ('5', '123', '123'); INSERT INTO `user` VALUES ('1', '123s', '123');
开始编写代码
pojo代码
package com.lwy.pojo; public class User { private String id; public String getId() { return id; } public void setId(String id) { this.id = id; } private String name; private String pwd; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } }
mapper
package com.lwy.mapper; import com.lwy.pojo.User; import org.apache.ibatis.annotations.Param; import java.util.List; public interface UserMapper { User userlogin(@Param("name")String name, @Param("pwd") String pwd); int adduser(User user); int delteuser(String id); int updateuser(User user); User getById(String id); List<User> getallUser(); }
xxMapper.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper SYSTEM "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="com.lwy.mapper.UserMapper"> <resultMap id="ResultMap" type="User"> <id property="userid" column="user_id"></id> <result property="name" column="name"></result> <result property="pwd" column="pwd"></result> </resultMap> <select id="userlogin" resultType="User"> SELECT * FROM `user` WHERE `name`=#{name} AND pwd=#{pwd} </select> <insert id="adduser" parameterType="User"> INSERT INTO user(id,name,pwd) VALUES(#{id},#{name},#{pwd}) </insert> <delete id="delteuser" parameterType="String"> delete from user where id=#{id} </delete> <update id="updateuser" parameterType="User"> UPDATE user SET NAME=#{name}, pwd=#{pwd} WHERE id=#{id} </update> <select id="getById" parameterType="String" resultMap="ResultMap"> SELECT * FROM user WHERE id=#{id} </select> <select id="getallUser" resultMap="ResultMap"> SELECT * FROM user </select> </mapper>
service层
package com.lwy.service; import com.lwy.pojo.User; import org.apache.ibatis.annotations.Param; import java.util.List; public interface UserService { User userlogin(@Param("name") String name, @Param("pwd") String pwd); int adduser(User user); int delteuser(String id); int updateuser(User user); User getById(String id); List<User> getallUser(); }
实现
package com.lwy.service.impl; import com.lwy.pojo.User; import com.lwy.mapper.UserMapper; import com.lwy.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; import java.util.UUID; @Service public class UserServiceImpl implements UserService { @Autowired UserMapper userMapper; @Override public int adduser(User user) { String id = UUID.randomUUID().toString(); user.setId(id); return userMapper.adduser(user); } @Override public int delteuser(String id) { return userMapper.delteuser(id); } @Override public int updateuser(User user) { return userMapper.updateuser(user); } @Override public User getById(String id) { return userMapper.getById(id); } @Override public List<User> getallUser() { return userMapper.getallUser(); } @Override public User userlogin(String name, String pwd) { return userMapper.userlogin(name, pwd); } }
controller层
package com.lwy.controller; import com.lwy.pojo.User; import com.lwy.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; @Controller public class UserController { @Autowired UserService userService; @RequestMapping("/login.do") public String login(String username, String password,Model model){ System.out.println("开始登陆"); userService.userlogin(username,password); // System.out.println("开始查询所有用户"); // List<User> userlist = userService.getallUser(); // model.addAttribute("userlist",userlist); return "redirect:/getAllUser.do"; } @RequestMapping("/addUser.do") public String addUser(User user){ userService.adduser(user); return "redirect:/getAllUser.do"; } @RequestMapping("/deleteUser.do") public String deleteUser(String id){ userService.delteuser(id); return "redirect:/getAllUser.do"; } @RequestMapping("/updateUser.do") public String updateUser(User user){ userService.updateuser(user); return "redirect:/getAllUser.do"; } @RequestMapping("/getById.do") public String getUserById(String id,Model model){ model.addAttribute("user",userService.getById(id)); return "pages/user_update"; } @RequestMapping("/getAllUser.do") public String getAllUser(Model model){ System.out.println("开始查询所有用户"); List<User> userlist = userService.getallUser(); model.addAttribute("userlist",userlist); return "pages/userlist"; } }
部署到tomcat中
如图
选择本地的tomcat 
页面
登陆
<%-- Created by IntelliJ IDEA. User: hasee Date: 2019/6/3 Time: 16:03 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <form action="../login.do" method="post"> 账号：<input type="text" name="username" /> 密码：<input type="password" name="password" /> <button type="submit">提交</button> </form> </body> </html>
显示
<%-- Created by IntelliJ IDEA. User: hasee Date: 2019/6/3 Time: 18:27 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <title>Title</title> </head> <body> 列表 <a href="/pages/user_add.jsp">添加</a> <a href="/pages/logout.do">退出</a> <a href="/pages/admin.jsp">admin page</a> <table> <tr> <td>id</td> <td>姓名</td> <td>密码</td> <td>操作</td> </tr> <c:forEach items="${requestScope.userlist}" var="list"> <tr> <td>${list.id}</td> <td>${list.name}</td> <td>${list.pwd}</td> <td> <a href="../getById.do?id=${list.id}">修改</a> <a href="../deleteUser.do?id=${list.id}">删除</a> </td> </tr> </c:forEach> </table> </body> </html>
添加
<%-- Created by IntelliJ IDEA. User: hasee Date: 2019/6/3 Time: 20:18 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <form method="post" action="../addUser.do"> 你的账号<input type="text" name="name"> 你的密码<input type="text" name="pwd" /> <button type="submit">保存</button> </form> </body> </html>
修改
<%-- Created by IntelliJ IDEA. User: hasee Date: 2019/6/3 Time: 20:18 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <title>Title</title> </head> <body> <form method="post" action="../updateUser.do"> <input type="hidden" name="id" value="${requestScope.user.id}"/> gfdshjsahsdhsdhsdhsd 你的账号<input type="text" name="name" value="${requestScope.user.name}"/> 你的密码<input type="text" name="pwd" value="${requestScope.user.pwd}"/> <button type="submit">修改</button> </form> </body> </html>
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