首先,SSM框架的整合除了需要各大框架本身的jar包之外,
还需要一个mybatis-spring的jar包,不然无法完成整合操作
首先来看整个项目的结构:
jsp文件夹:由于我们编写的jsp文件里面可能包含业务逻辑,因此为了保证安全性,将其放置在客户端无法访问的WEB-INF目录下
resource静态资源文件:由于静态资源一般都是些css,html或者JavaScript文件,客户端访问网站的时候回自动下载到客户机上,因此并没有安全性可言,所以我们不必将resource文件夹放置在WEB-INF目录下,只需将其放置在项目的根目录下即可
Web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
id="WebApp_ID" version="4.0">
<!-- Spring配置文件 -->
<!-- 配置Spring配置文件的名称和路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<!-- 配置Spring配置文件的完整路径 -->
<param-value>classpath:com/config/Spring/Spring.xml</param-value>
</context-param>
<!-- 配置ContextLoaderListener监听器 -->
<!-- 当 web项目启动的时候，会把 Spring IOC 容器获取到，并放入 application 域中 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- SpringMVC配置文件 -->
<!-- 配置SpringMVC的拦截器DispatcherServlet类,用以拦截所有的URL请求 -->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 若不配置<contextConfigureLocation>节点,则SpringMVC配置文件的命名规则必须满足 文件名-servlet.xml,比如你的配置文件名为:SpringMVC,那完整的文件名必须为:SpringMVC-servlet.xml
否则将无法扫描到对应的配置文件! -->
<init-param>
<!-- <contextConfigureLocation>节点配置的是SpringMVC配置文件的位置 -->
<param-name>contextConfigLocation</param-name>
<!-- "classpath:" 路径对应的是工程目录下的src文件 -->
<!-- 我的SpringMVC文件放在com.config包下,所以对应的路径即为: classpath:com/config/SpringMVC/springMVC-servlet.xml -->
<param-value>classpath:com/config/SpringMVC/springMVC-servlet.xml</param-value>
</init-param>
<!-- 这个配置是使DispatchServlet拦截器随着Web服务启动的时候启动,而不是当客户端发送请求时才启动 -->
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 配置<servlet-mapping>节点 -->
<servlet-mapping>
<!-- 注意:这里的<servlet-name>节点的值需要与<servlet>节点的值保持一致 -->
<servlet-name>springMVC</servlet-name>
<!-- 配置想要拦截的url请求格式, "/" 表示拦截所有请求 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 过滤器,用于处理表单传值中的POST方式传值出现的中文乱码 -->
<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>
</web-app>
Spring配置文件
<?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:aop="http://www.springframework.org/schema/aop"
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/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 这个是Spring的配置文件 -->
<!-- 开启Spring的注解,若不添加该项,将来使用@Autowired注解时会报错-->
<context:annotation-config />
<!-- 扫描包,将指定包下的含有特殊注解的对象(如@Component,@Service等...)交给Spring IOC容器管理 -->
<context:component-scan base-package="com.service" />
<!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/shop?characterEncoding=UTF-8&useSSL=false"></property>
<property name="username" value="root"></property>
<property name="password" value="admin"></property>
</bean>
<!-- 配置sqlSession属性 -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- typeAliasesPackage：它一般对应我们的实体类所在的包，这个时候会自动取对应包中不包括包名的
简单类名作为包括包名的别名。多个package之间可以用逗号或者分号等来进行分隔。(value的值一定要是包的全名) -->
<property name="typeAliasesPackage" value="com.pojo"></property>
<!-- 这个属性是必须的 -->
<property name="dataSource" ref="dataSource"></property>
<!-- mappLocations: 它表示我们存放Mapper.xml文件的位置 -->
<property name="mapperLocations" value="classpath:com/mapper/*.xml"></property>
</bean>
<!-- 自动扫描 将Mapper接口生成代理注入到Spring Mybatis在与Spring集成的时候可以配置MapperFactoryBean来生成Mapper接口的代理 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.mapper"></property>
</bean>
</beans>
SpringMVC配置文件
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
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-4.3.xsd">
<context:annotation-config/>
<!-- 自动扫描包,我们只扫描com.controller包下的类即可,其他的由Spring配置文件管理即可 -->
<context:component-scan base-package="com.controller"></context:component-scan>
<!-- 注解驱动（代替了处理器映射器和处理器适配器） -->
<mvc:annotation-driven/>
<!-- 处理静态资源请求 -->
<mvc:default-servlet-handler/>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
数据表脚本代码:
CREATE TABLE `s_user` (
`userid` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) DEFAULT NULL,
`password` varchar(255) DEFAULT NULL,
`email` varchar(255) DEFAULT NULL,
`phone` varchar(255) DEFAULT NULL,
`status` varchar(255) NOT NULL DEFAULT '0',
`code` varchar(255) DEFAULT NULL,
PRIMARY KEY (`userid`)
) ENGINE=InnoDB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8;
实体类(即POJO)User:
package com.pojo;
public class User {
private Integer userid;
private String username;
private String password;
private String email;
private String phone;
private Integer status;
private String code;
public Integer getUserid() {
return userid;
}
public void setUserid(Integer userid) {
this.userid = userid;
}
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;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
@Override
public String toString() {
return "User [userid=" + userid + ", username=" + username + ", password=" + password + ", email=" + email
+ ", phone=" + phone + ", status=" + status + ", code=" + code + "]";
}
}
UserMapper.xml配置文件:
<?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.mapper.UserMapper">
<select id="getAllUsers" resultType="User">
SELECT * FROM s_user
</select>
<select id="getUserById" parameterType="int" resultType="User">
SELECT *
FROM s_user WHERE userid = #{userid}
</select>
<insert id="insertUser" parameterType="User"
useGeneratedKeys="true" keyProperty="userid">
INSERT INTO s_user(username,password,email,phone)
VALUES(#{username},#{password},#{email},#{phone})
</insert>
<update id="updateUserById" parameterType="User">
UPDATE s_user SET username = #{username},
password = #{password},
email = #{email},
phone = #{phone}
WHERE
userid = #{userid}
</update>
<delete id="deleteUserById" parameterType="int">
DELETE FROM s_user WHERE userid = #{userid}
</delete>
</mapper>
UserMapper.java接口:
package com.mapper;
import com.pojo.User;
import java.util.*;
public interface UserMapper {
public List<User> getAllUsers();
public User getUserById(int userid);
public boolean deleteUserById(int userid);
public boolean insertUser(User user);
public boolean updateUserById(User user);
}
注意:XXMapper.xml配置文件和XXMapper.java接口必须放置在同一包下,否则初始化Spring的时候可能会报错;
业务逻辑层
1.UserService接口:
package com.service;
import com.pojo.User;
import java.util.*;
public interface UserService {
public List<User> getAllUsers();
public User getUserById(int userid);
public boolean deleteUserById(int userid);
public boolean insertUser(User user);
public boolean updateUserById(User user);
}
2.UserServiceImpl接口实现类:
package com.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.mapper.UserMapper;
import com.pojo.User;
import com.service.UserService;
//使用@Service注解标记该类,表明该类属于业务逻辑层,并由Spring IOC容器接手其生命周期
@Service
public class UserServiceImpl implements UserService {
//使用@Autowired注解标记该对象后,在之后使用该对象则会有IOC分配,无需手动new出来;
@Autowired
UserMapper userMapper;
@Override
public List<User> getAllUsers() {
// TODO Auto-generated method stub
return userMapper.getAllUsers();
}
@Override
public User getUserById(int userid) {
// TODO Auto-generated method stub
return userMapper.getUserById(userid);
}
@Override
public boolean deleteUserById(int userid) {
// TODO Auto-generated method stub
return userMapper.deleteUserById(userid);
}
@Override
public boolean insertUser(User user) {
// TODO Auto-generated method stub
return userMapper.insertUser(user);
}
@Override
public boolean updateUserById(User user) {
// TODO Auto-generated method stub
return userMapper.updateUserById(user);
}
}
Controller控制层
1.UserController控制器类
package com.controller;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.pojo.User;
import com.service.UserService;
import com.service.impl.UserServiceImpl;
//使用@Controller注解标注该类,表明此类为控制器类;
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping(value="/user")
public String user(Map<Object,Object> map) {
List<User> userList = userService.getAllUsers();
map.put("user", userList);
return "user";
}
}
user.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>User</title>
</head>
<body>
<h1>${requestScope.user}</h1>
</body>
</html>
启动服务器并打开浏览器,在浏览器地址栏输入:
http://localhost:8080/Shop/user
得到以下结果:
至此,最基础的SSM框架搭建完成,后续学习了Maven可以再用Maven搭建一次SSM框架~~~
转自：https://blog.csdn.net/weixin_39549527/article/details/81089435
