SSM整合

SSM项目

• SpringMVC：表现层框架，处理浏览器发送的请求，找到具体的数据，将具体数据响应到服务器，
• Spring：整合形框架，通过Ioc管理对象，比如Mybatis中操作数据库的SqlSession对象，MyBatis操作数据库时需要的事务功能，也可以使用Spring中的AOP的重要应用，来声明事务实现，
• MyBatis：持久层框架，连接数据库，操作数据库，访问数据库

创建项目

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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>

  <groupId>com.singroupId>
  <artifactId>SSMDemoartifactId>
  <version>1.0-SNAPSHOTversion>
  
  <packaging>warpackaging>

  <name>SSMDemo Maven Webappname>
  
  <url>http://www.example.comurl>

  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.8maven.compiler.source>
    <maven.compiler.target>1.8maven.compiler.target>
    <spring.version>5.3.22spring.version>
  properties>

  <dependencies>
    
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
      <version>${spring.version}version>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-beansartifactId>
      <version>${spring.version}version>
    dependency>

    
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
      <version>${spring.version}version>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
      <version>${spring.version}version>
    dependency>

    
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-jdbcartifactId>
      <version>${spring.version}version>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aspectsartifactId>
      <version>${spring.version}version>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-testartifactId>
      <version>${spring.version}version>
    dependency>

    
    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
      <version>3.5.10version>
    dependency>
    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>2.0.7version>
    dependency>
    
    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>druidartifactId>
      <version>1.2.8version>
    dependency>
    
    
    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      
      <version>5.1.47version>
    dependency>

    
    <dependency>
      <groupId>log4jgroupId>
      <artifactId>log4jartifactId>
      <version>1.2.17version>
    dependency>
    
    <dependency>
      <groupId>ch.qos.logbackgroupId>
      <artifactId>logback-classicartifactId>
      <version>1.2.11version>
    dependency>

    
    
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>javax.servlet-apiartifactId>
      <version>4.0.1version>
    dependency>

    
    
    <dependency>
      <groupId>org.thymeleafgroupId>
      <artifactId>thymeleaf-spring5artifactId>
      <version>3.0.15.RELEASEversion>
    dependency>
    
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.11version>
      <scope>testscope>
    dependency>
  dependencies>

  <build>
    <finalName>SSMDemofinalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-clean-pluginartifactId>
          <version>3.1.0version>
        plugin>
        
        <plugin>
          <artifactId>maven-resources-pluginartifactId>
          <version>3.0.2version>
        plugin>
        <plugin>
          <artifactId>maven-compiler-pluginartifactId>
          <version>3.8.0version>
        plugin>
        <plugin>
          <artifactId>maven-surefire-pluginartifactId>
          <version>2.22.1version>
        plugin>
        <plugin>
          <artifactId>maven-war-pluginartifactId>
          <version>3.2.2version>
        plugin>
        <plugin>
          <artifactId>maven-install-pluginartifactId>
          <version>2.5.2version>
        plugin>
        <plugin>
          <artifactId>maven-deploy-pluginartifactId>
          <version>2.8.2version>
        plugin>
      plugins>
    pluginManagement>
  build>
project>

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_4_0.xsd"
         version="4.0">
    
    
    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:applicationContext.xmlparam-value>
    context-param>

    
    
    <listener>
        
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    
    
    
    <servlet>
        <servlet-name>dispatcherServletservlet-name>
        
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            
            <param-value>classpath:springMVC.xmlparam-value>
        init-param>
        
        <load-on-startup>1load-on-startup>
    servlet>
    
    <servlet-mapping>
        <servlet-name>dispatcherServletservlet-name>
        
        <url-pattern>/url-pattern>
    servlet-mapping>

    
    
    <filter>
        <filter-name>characterEncodingFilterfilter-name>
        
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>

        
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF-8param-value>
        init-param>

        
        <init-param>
            <param-name>forceResponseEncodingparam-name>
            <param-value>trueparam-value>
        init-param>
    filter>
    
    <filter-mapping>
        <filter-name>characterEncodingFilterfilter-name>
        
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    
    <filter>
        <filter-name>hiddenHttpMethodFilterfilter-name>
        
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
    filter>
    
    <filter-mapping>
        <filter-name>hiddenHttpMethodFilterfilter-name>
        
        <url-pattern>/*url-pattern>
    filter-mapping>
web-app>

applicationContext.xml

<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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
       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 https://www.springframework.org/schema/context/spring-context.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    

    
    
    <context:component-scan base-package="com">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    context:component-scan>

    
    
    <context:property-placeholder location="classpath:jdbc.properties"/>
    
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    bean>

    
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="classpath:mybatis-config.xml">property>
        <property name="dataSource" ref="dataSource">property>
        <property name="mapperLocations" value="classpath:mapper/*.xml">property>
    bean>

    
    
    <mybatis-spring:scan base-package="com.sin.mapper"/>

    
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource">property>
    bean>

    
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        
        <tx:attributes>
            
            <tx:method name="*"/>
            
            <tx:method name="get*" read-only="true"/>
        tx:attributes>
    tx:advice>

    
    
    <aop:config>
        
        <aop:pointcut id="pt" expression="execution(* com.sin.service.*.*(..))"/>
        
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt">aop:advisor>
    aop:config>
beans>

db.properties

jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/demo
jdbc.username = root
jdbc.password = 123456

SpringMVC.xml

<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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    

    
    <context:component-scan base-package="com" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    context:component-scan>

    
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        
                        <property name="prefix" value="/WEB-INF/templates/"/>
                        
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    bean>
                property>
            bean>
        property>
    bean>
    
    <mvc:default-servlet-handler/>

    
    <mvc:annotation-driven/>

beans>

mybatis-config.xml

DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        
        <setting name="cacheEnabled" value="true"/>
    settings>
    
    <typeAliases>
        <package name="com.sin"/>
    typeAliases>
    <databaseIdProvider type="DB_VENDOR">
        
        <property name="MySQL" value="mysql"/>
        <property name="Oracle" value="oracle"/>
        <property name="SQL Server" value="sqlserver"/>
    databaseIdProvider>
configuration>

log4j.xml

<configuration status="TRACE">
    
    <appenders>
        
        <console name="Console" target="SYSTEM_OUT">
            
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        console>
    appenders>
    
    
    <logger name="java.sql">
        <level value="debug" />
    logger>
    <logger name="org.apache.ibatis">
        <level value="info" />
    logger>
    <loggers>
        <root level="debug">
            <appender-ref ref="Console"/>
        root>
    loggers>
configuration>

SQL

use demo;

-- 创建数据表
-- primary key : 逐渐id
-- auto_increment : 字段自增
-- comment : 字段的注释
-- character set utf8 : 字段的编码格式
-- default null : 字段默认为null
-- charset = utf8 : 将表的编码格式设置为utf8
create table users(
    id int primary key auto_increment comment '主键id',
    name varchar(20) character set utf8 default null comment '姓名',
    email varchar(20) default null comment '邮箱'
)charset = utf8;

insert into users(name,email) values ('张三','[email protected]');

select id,name,email from users;

Users.java

package com.sin.pojo;

public class Users {
    private int id;
    private String  name;
    private String email;

    public int getId(){
        return id;
    }
    public void setId(int id){
        this.id=id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

UsersMapper.java

package com.sin.mapper;

import com.sin.pojo.Users;
import org.apache.ibatis.annotations.Mapper;


import java.util.List;

@Mapper 
public interface UsersMapper {

    List<Users> getAllUsers();

    Users getUserById(int id);

    void addUser(Users user);

    void updateUser(Users user);

    void deleteUser(int id);

}

UsersMapper.xml

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.sin.mapper.UsersMapper">
    <select id="getAllUsers" resultType="com.sin.pojo.Users">
        SELECT * FROM users;
    select>

    <select id="getUserById" parameterType="int" resultType="com.sin.pojo.Users">
        SELECT * FROM users WHERE id = #{id};
    select>

    <insert id="addUser" parameterType="com.sin.pojo.Users">
        INSERT INTO users (name, email) VALUES (#{name}, #{email});
    insert>

    <update id="updateUser" parameterType="com.sin.pojo.Users">
        UPDATE users SET name = #{name}, email = #{email} WHERE id = #{id};
    update>

    <delete id="deleteUser" parameterType="int">
        DELETE FROM users WHERE id = #{id};
    delete>
mapper>

UsersService.java

package com.sin.service;

import com.sin.pojo.Users;

import java.util.List;

public interface UsersService {
    List<Users> getAllUsers();
    Users getUserById(int id);
    void addUser(Users user);
    void updateUser(Users user);
    void deleteUser(int id);
}

UsersServiceImpl.java

package com.sin.service.impl;

import com.sin.mapper.UsersMapper;
import com.sin.pojo.Users;
import com.sin.service.UsersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service // 表示为Service层
public class UsersServiceImpl implements UsersService {

    @Autowired(required = false)
    private UsersMapper usersMapper;

    @Override
    public List<Users> getAllUsers() {
        return usersMapper.getAllUsers();
    }

    @Override
    public Users getUserById(int id) {
        return usersMapper.getUserById(id);
    }

    @Override
    public void addUser(Users user) {
        usersMapper.addUser(user);
    }

    @Override
    public void updateUser(Users user) {
        usersMapper.updateUser(user);
    }

    @Override
    public void deleteUser(int id) {
        usersMapper.deleteUser(id);
    }
}

UsersController.java

package com.sin.controller;

import com.sin.pojo.Users;
import com.sin.service.UsersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;

@Controller
public class UsersController {

    @Autowired(required = false)
    private UsersService userService;

    @GetMapping("/users")
    public String getAllUsers(Model model) {
        List<Users> users = userService.getAllUsers();
        model.addAttribute("users", users);
        return "userList";
    }

    @GetMapping("/users/{id}")
    public String getUserById(@PathVariable int id, Model model) {
        Users user = userService.getUserById(id);
        model.addAttribute("user", user);
        return "userDetails";
    }

    @GetMapping("/users/add")
    public String addUserForm(Model model) {
        model.addAttribute("user", new Users());
        return "addUser";
    }

    @PostMapping("/users")
    public String addUser(@ModelAttribute("user") Users user) {
        userService.addUser(user);
        return "redirect:/users";
    }

    @GetMapping("/users/{id}/edit")
    public String editUserForm(@PathVariable int id, Model model) {
        Users user = userService.getUserById(id);
        model.addAttribute("user", user);
        return "editUser";
    }

    @PostMapping("/users/{id}")
    public String updateUser(@PathVariable int id, @ModelAttribute("user") Users user) {
        userService.updateUser(user);
        return "redirect:/users";
    }

    @GetMapping("/users/{id}/delete")
    public String deleteUser(@PathVariable int id) {
        userService.deleteUser(id);
        return "redirect:/users";
    }
}

userList.html

DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>用户列表title>
head>
<body>
<h1>用户列表h1>
<table>
    <thead>
    <tr>
        <th>IDth>
        <th>姓名th>
        <th>邮箱th>
        <th>操作th>
    tr>
    thead>
    <tbody>
    <tr th:each="user : ${users}">
        <td th:text="${user.id}">td>
        <td th:text="${user.name}">td>
        <td th:text="${user.email}">td>
        <td>
            <a th:href="@{/users/{id}(id=${user.id})}">查看a>
            <a th:href="@{/users/{id}/edit(id=${user.id})}">编辑a>
            <a th:href="@{/users/{id}/delete(id=${user.id})}">删除a>
        td>
    tr>
    tbody>
table>
<a href="/users/add">添加用户a>
body>
html>

addUser.html

DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>添加用户title>
head>
<body>
<h1>添加用户h1>
<form th:action="@{/users}" method="post" th:object="${user}">
    <label>姓名: <input type="text" th:field="*{name}" />label><br/>
    <label>邮箱: <input type="email" th:field="*{email}" />label><br/>
    <input type="submit" value="添加" />
form>
<a href="/users">返回列表a>
body>
html>

editUser.html

DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>修改用户title>
head>
<body>
<h1>修改列表h1>
<form th:action="@{/users/{id}(id=${user.id})}" method="post" th:object="${user}">
    <input type="hidden" th:field="*{id}" />
    <label>姓名: <input type="text" th:field="*{name}" />label><br/>
    <label>邮箱: <input type="email" th:field="*{email}" />label><br/>
    <input type="submit" value="修改" />
form>
<a href="/users">返回列表a>
body>
html>

userDetails.html

DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>用户详情title>
head>
<body>
<h1>用户详情h1>
<p>id: <span th:text="${user.id}">span>p>
<p>姓名: <span th:text="${user.name}">span>p>
<p>邮箱: <span th:text="${user.email}">span>p>
<a href="/users">返回列表a>
body>
html>

效果