Spring学习笔记（九）简单的SSM框架整合

实验目的

掌握SSM框架整合。

实验环境

硬件：PC机

操作系统：Windows

开发工具：idea

实验内容

整合SSM框架。

实验步骤

1. 搭建SSM环境：构建web项目，导入需要的jar包，通过单元测试测试各层框架搭建的正确性。

2

Mapper编写User详情查询；service编写详情查询业务逻辑控制 controller层控制页面的跳转，在详情页面渲染用户详情。

项目结构：

Pom.xml配置文件

注意完成这部分后需要重新加载项目，这里创建了一个maven项目

    4.0.0
    com.example
    SpringMVC1
    1.0-SNAPSHOT
    war
    
        8
        8
    
    
        
        
            org.springframework
            spring-core
            5.3.10
        
        
            org.springframework
            spring-context
            5.3.10
        
        
            org.springframework
            spring-web
            5.3.10
        
        
        
            org.springframework
            spring-webmvc
            5.3.10
        
        
        
            org.mybatis
            mybatis
            3.5.7
        
        
            org.mybatis
            mybatis-spring
            2.0.7
        
        
        
            mysql
            mysql-connector-java
            8.0.28
        
        
            org.springframework
            spring-jdbc
            5.3.10
        
        
        
            javax.servlet
            javax.servlet-api
            4.0.1
            provided
        
        
        
            junit
            junit
            4.13.2
            test
        

        
            org.springframework
            spring-test
            5.3.10
            test
        
    
    
        
        

            
                org.apache.tomcat.maven
                tomcat7-maven-plugin
                2.2
                
                    utf-8
                    8080 
                    
                    /SSM测试 
                
            
        
    

UserController

package org.example.controller;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserServie userServie;
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public ModelAndView getUserById(@PathVariable("id") Long id) {
        ModelAndView mav = new ModelAndView();
        User user = userServie.getById(id);
        // 添加user对象到ModelAndView中
        mav.addObject("user", user);
        // 设置视图名称为userDetails，对应userDetails.jsp页面
        mav.setViewName("userDetails");
        return mav;
    }
}

UserMapper

package org.example.mapper;
import org.example.model.User;
public interface UserMapper {
    User getById(Long id);
    User getByUsername(String username); // 添加根据username查询的方法
}

User

package org.example.model;
public class User {
    private Long id;
    private String username;
    private String password;
    private Long departmentId;
    public User() {
    }
    public User(Long id, String username, String password, Long departmentId) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.departmentId = departmentId;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long 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;
    }

    public Long getDepartmentId() {
        return departmentId;
    }

    public void setDepartmentId(Long departmentId) {
        this.departmentId = departmentId;
    }
}

UserServiceImpl

package org.example.service.impl;

import org.example.mapper.UserMapper;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserServie {
    @Autowired
    private UserMapper userMapper;

    @Override
    public User getById(Long id) {
        return userMapper.getById(id);
    }

    @Override
    public User getByUsername(String username) {
        return userMapper.getByUsername(username);
    }
}

UserServie

package org.example.service;
import org.example.model.User;
public interface UserServie {
    User getById(Long id);
    User getByUsername(String username); // 添加根据username查询的方法声明
}

编写UserMapper.xml

注意：s_user是数据库mydb中的一个数据表

    
        SELECT id, username, password, dept_id AS departmentId
        FROM  s_user
        WHERE id = #{id}
    
    

编写applicationContext.xml 

编写user Details.jsp

    
    


User Details

    

        
ID
        
Name
        
Password
        
Department ID
    
    

        
${user.id}
        
${user.username}
        
${user.password}
        
${user.departmentId}
    

编写web.xml

    
    
        dispatcher
        org.springframework.web.servlet.DispatcherServlet
        
            contextConfigLocation
            classpath:applicationContext.xml
        
        1
    

    
        dispatcher
        /
    

编写一个测试类用于测试整合情况

UserServicelmplTest.java

package org.example.service.impl;

import org.example.model.User;
import org.example.service.UserServie;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import static org.junit.Assert.*;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class UserServicelmplTest {

    @Autowired
    private UserServie userService;

    @Test
    public void testGetById() {
        Long userId = 11L;
        User user = userService.getById(userId);
        assertNotNull("The user should not be null", user);
        assertEquals("The user ID should match the expected ID", userId, user.getId());
        System.out.println("Retrieved user: " + user.toString());

    }
}

测试结果

运行效果

部署本地后在本地浏览器的运行地址为：localhost:8080/SSM测试/user/12,其中12为响应的id