SSM框架整合
SSM框架整合
零、建立一个空白maven项目，建立数据库
create database test;
use test;
create table user
(
id int primary key,
username varchar(20) not null,
password varchar(20) not null
);
一、导入依赖
<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>org.examplegroupId>
<artifactId>ssmartifactId>
<version>1.0-SNAPSHOTversion>
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.13version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.2.4.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>5.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>5.2.6.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.2.6.RELEASEversion>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.4version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.4version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.20version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.9.5version>
dependency>
dependencies>
project>
二、resource文件
1、创建spring-config.xml文件，作为spring的总配置
<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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="classpath:spring-mapper.xml"/>
<import resource="classpath:spring-service.xml"/>
<import resource="classpath:spring-mvc.xml"/>
beans>
可能会出现上图的爆红，是因为还没有创建那三个文件，不要着急，下面一步一步来。
下面的过程中也是的，如果出现爆红，都是文件还没有创建的原因。
2、创建spring-mapper.xml，用来配置和数据库相关的东西
<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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<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/test"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:mappers/UserMapper.xml"/>
bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.wzh.mapper"/>
bean>
beans>
3、创建mybatis-config.xml，作为mybatis的总配置
由于使用了spring来怕连接数据库，所以不同于纯粹的mybatis项目，这里的mybatis-config.xml里东西不多。
<configuration>
<typeAliases>
<package name="com.wzh.pojo"/>
typeAliases>
configuration>
4、建立/mappers/UserMapper.xml
作为UserMapper的配置文件
<mapper namespace="com.wzh.mapper.UserMapper">
<select id="getAllUsers" resultType="com.wzh.pojo.User">
select * from test.user
select>
mapper>
5、建立spring-mvc.xml，管理视图层
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://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">
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<context:component-scan base-package="com.wzh.controller"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
bean>
beans>
6、建立spring-service.xml，管理业务层
<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
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.wzh.service"/>
<bean id="userServiceImpl" class="com.wzh.service.UserServiceImpl">
<property name="userMapper" ref="userMapper"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
beans>
最后resource的效果如图：
三、java文件
按照常规的mvc编写程序，符合三层架构，在自己的包下，建立controller，mapper，pojo，service若干个包
如图：
1、pojo层
写一个User.java
也可以使用lombok插件，我没有使用
package com.wzh.pojo;
public class User {
private int id;
private String username;
private String password;
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
public User() {
}
public User(int id, String username, String password) {
this.id = id;
this.username = username;
this.password = password;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2、mapper层
写一个UserMapper.interface
package com.wzh.mapper;
import com.wzh.pojo.User;
import java.util.List;
public interface UserMapper {
public List<User> getAllUsers();
}
3、service层
写一个UserService.interface
package com.wzh.service;
import com.wzh.pojo.User;
import java.util.List;
public interface UserService {
public List<User> getAllUsers();
}
再写一个UserServiceImpl.java
package com.wzh.service;
import com.wzh.mapper.UserMapper;
import com.wzh.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserServiceImpl implements UserService{
private UserMapper userMapper;
public void setUserMapper(UserMapper userMapper) {
this.userMapper = userMapper;
}
public List<User> getAllUsers() {
return userMapper.getAllUsers();
}
}
4、controller层
写一个UserController.java
package com.wzh.controller;
import com.wzh.pojo.User;
import com.wzh.service.UserService;
import com.wzh.service.UserServiceImpl;
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.RequestMapping;
import java.util.List;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
@Qualifier("userServiceImpl")
private UserService userService;
@RequestMapping("/allUsers")
public String list(Model model) {
List<User> users = userService.getAllUsers();
model.addAttribute("userList", users);
return "allUser";
}
}
最后的效果：
四、web
1、给项目添加web框架支持
右键项目名，添加web框架支持
2、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_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>SpringMvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-config.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>SpringMvcservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>encodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>utf-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>encodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<session-config>
<session-timeout>15session-timeout>
session-config>
web-app>
3、重写index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
nihao
进入用户展示界面
4、在WEB-INF目录下创建：/jsp/allUser.jsp
这里用到了c标签
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
用户展示页面
用户展示页面
用户id：${user.id}
用户名：${user.username}
用户密码：${user.password}
5、配置tomcat
- 将所有依赖导入到web项目中
