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Ssm framework construction process [easy to understand]
2022-08-10 11:57:00 【Full stack programmer webmaster】
大家好,又见面了,我是你们的朋友全栈君.
1.新建一个maven web项目（Please refer to the new process：https://blog.csdn.net/AinUser/article/details/78185128）,项目结构如下：
2.项目中需要引入的jar包：
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>In fact, you can introduce related ones when neededjar包即可,This will avoid introducing some useless ones. 3.mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD SQL Map Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<!--later for testing-->
<typeAlias type="com.tgb.entity.User" alias="User" />
</typeAliases>
</configuration>4.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:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:mapping/UserMapper.xml"/>
</bean>
<!-- DAO接口所在包名,SpringIt will automatically find the class in it -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.tgb.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!--事务管理-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--开启事务注解扫描-->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>5.applicationContext-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.xsd">
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<context:component-scan base-package="com.tgb"/>
<!-- <mvc:resources mapping="/static/**" location="WEB-INF/static/"/>-->
<!--配置springMVC的视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>6.web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<!--加载spring容器配置-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--Spring容器加载所有的配置文件的路径-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:spring/applicationContext.xml</param-value>
</context-param>
<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*:spring/applicationContext-mvc.xml</param-value>
</init-param>
<!--用来标记是否在项目启动时就加在此Servlet,0或正数表示容器在应用启动时就加载这个Servlet, 当是一个负数时或者没有指定时,则指示容器在该servlet被选择时才加载.正数值越小启动优先值越高 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>到此为止,The configuration file is basically ready,We need to write a function to test it. 7.生成实体,mapper等文件.（逆向工程参考：https://blog.csdn.net/zhshulin/article/details/23912615） 建表Sql：
CREATE TABLE `tb_user` ( `ID` int(11) NOT NULL AUTO_INCREMENT, `NAME` varchar(18) NOT NULL, `SEX` varchar(18) NOT NULL, `AGE` int(11) DEFAULT NULL, PRIMARY KEY (`ID`) ) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8;User实体：
package com.tgb.entity;
public class User {
private Integer id;
private String name;
private String sex;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name == null ? null : name.trim();
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex == null ? null : sex.trim();
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}UserMapper：
package com.tgb.dao;
import com.tgb.entity.User;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface UserMapper {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
List<User> selectAllUser();
}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" >
<mapper namespace="com.tgb.dao.UserMapper" >
<resultMap id="BaseResultMap" type="com.tgb.entity.User" >
<id column="ID" property="id" jdbcType="INTEGER" />
<result column="NAME" property="name" jdbcType="VARCHAR" />
<result column="SEX" property="sex" jdbcType="VARCHAR" />
<result column="AGE" property="age" jdbcType="INTEGER" />
</resultMap>
<sql id="Base_Column_List" >
ID, NAME, SEX, AGE
</sql>
<select id="selectAllUser" resultType="User">
select * from tb_user;
</select>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from tb_user
where ID = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from tb_user
where ID = #{id,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="User" >
insert into tb_user (ID, NAME, SEX,
AGE)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{sex,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" parameterType="User" >
insert into tb_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
ID,
</if>
<if test="name != null" >
NAME,
</if>
<if test="sex != null" >
SEX,
</if>
<if test="age != null" >
AGE,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
</if>
<if test="sex != null" >
#{sex,jdbcType=VARCHAR},
</if>
<if test="age != null" >
#{age,jdbcType=INTEGER},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="User" >
update tb_user
<set >
<if test="name != null" >
NAME = #{name,jdbcType=VARCHAR},
</if>
<if test="sex != null" >
SEX = #{sex,jdbcType=VARCHAR},
</if>
<if test="age != null" >
AGE = #{age,jdbcType=INTEGER},
</if>
</set>
where ID = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="User" >
update tb_user
set NAME = #{name,jdbcType=VARCHAR},
SEX = #{sex,jdbcType=VARCHAR},
AGE = #{age,jdbcType=INTEGER}
where ID = #{id,jdbcType=INTEGER}
</update>
</mapper>Service接口和实现类：
package com.tgb.service;
import com.tgb.entity.User;
import java.util.List;
/** * Created by xiaojie on 2018/7/8. */
public interface UserService {
public List<User> getUser();
}
package com.tgb.service.impl;
import com.tgb.dao.UserMapper;
import com.tgb.entity.User;
import com.tgb.service.UserService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
/** * Created by xiaojie on 2018/7/8. */
@Service("userService")
public class UserServiceImpl implements UserService {
@Resource(name="userMapper")
private UserMapper userMapper;
@Override
public List<User> getUser() {
return userMapper.selectAllUser();
}
}Controller
package com.tgb.controller;
import com.tgb.entity.User;
import com.tgb.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.annotation.Resource;
import java.util.List;
/** * Created by xiaojie on 2018/7/8. */
@Controller
@RequestMapping(value = "/user")
public class UserController {
@Resource(name="userService")
UserService userService;
@RequestMapping(value = "/list")
public ModelAndView list(){
ModelAndView mv = new ModelAndView();
List<User> userList = userService.getUser();
mv.addObject("userList",userList);
mv.setViewName("/show");
return mv;
}
}创建一个show.jsp文件：
<%-- Created by IntelliJ IDEA. User: xiaojie Date: 2018/7/8 Time: 15:25 To change this template use File | Settings | File Templates. --%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<table border="1">
<tr>
<td>序号</td>
<td>姓名</td>
<td>年龄</td>
<td>性别</td>
</tr>
<c:choose>
<c:when test="${not empty userList}">
<c:forEach items="${userList}" var="user" varStatus="vs">
<tr>
<td>${user.id}</td>
<td>${user.name}</td>
<td>${user.age}</td>
<td>${user.sex}</td>
</tr>
</c:forEach>
</c:when>
<c:otherwise>
<tr>
<td colspan="2">无数据！</td>
</tr>
</c:otherwise>
</c:choose>
</table>
</body>
</html>启动项目,在浏览器里输入http://localhost:8080/user/list If the following list appears,则说明ssmA line has been passed.
Follow this step to do it,Usually not displayed smoothly,可能会遇到一些问题,百度一下,都会解决的.
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