Java学习路线-65：整合 SSM-Spring+SpringMVC+MyBatis

发布日期：2021-07-01 06:11:42 浏览次数：2 分类：技术文章

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整合 SSM

项目结构

.├── pom.xml└── src    └── main        ├── java        │   └── com        │       └── pengshiyu        │           ├── controller        │           │   └── UserController.java        │           ├── dao        │           │   ├── UserDao.java        │           │   └── impl        │           │       └── UserDaoImpl.java        │           ├── interceptor        │           │   └── MyInterceptor.java        │           ├── service        │           │   ├── UserService.java        │           │   └── impl        │           │       └── UserServiceImpl.java        │           └── vo        │               └── User.java        ├── resources        │   ├── applicationContext.xml        │   ├── db.properties        │   ├── mappers        │   │   └── user.mapper.xml        │   ├── mybatis-config.xml        │   └── spring-mvc.xml        └── webapp            ├── WEB-INF            │   └── web.xml            ├── detail.jsp            ├── edit.jsp            └── list.jsp

依赖

pom.xml


   
       
    
     4.0.0
        
    
     org.example
        
    
     spring-mvc-demo
        
    
     1.0-SNAPSHOT
        
            
                 
                  
                      
       
        org.apache.tomcat.maven
                       
       
        tomcat7-maven-plugin
                       
       
        2.2
                       
                           
        
         8080
                            
        
         /
                            
        
         UTF-8
                            
                            
        
         true
                            
        
         src/main/webapp/WEB-INF/web.xml
                            
        
         true
                        
                   
              
         
        
            
             
                 
      
       org.springframework
                  
      
       spring-core
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-beans
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-context
                  
      
       5.2.6.RELEASE
              
             
                 
      
       org.springframework
                  
      
       spring-context-support
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-web
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-webmvc
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-aop
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       org.springframework
                  
      
       spring-expression
                  
      
       5.2.6.RELEASE
              
             
             
                 
      
       commons-logging
                  
      
       commons-logging
                  
      
       1.2
              
             
                 
      
       javax.servlet
                  
      
       javax.servlet-api
                  
      
       4.0.1
                  
      
       provided
              
             
                 
      
       taglibs
                  
      
       standard
                  
      
       1.1.2
              
             
                 
      
       jstl
                  
      
       jstl
                  
      
       1.2
              
             
             
             
                 
      
       commons-io
                  
      
       commons-io
                  
      
       2.7
              
             
             
                 
      
       commons-fileupload
                  
      
       commons-fileupload
                  
      
       1.4
              
             
             
             
                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-annotations
                  
      
       2.11.0
              
             
             
                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-databind
                  
      
       2.11.0
              
             
             
                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-core
                  
      
       2.11.0
              
             
                 
      
       org.aspectj
                  
      
       aspectjweaver
                  
      
       1.9.5
              
             
                 
      
       org.mybatis
                  
      
       mybatis
                  
      
       3.5.4
              
             
                 
      
       org.mybatis
                  
      
       mybatis-spring
                  
      
       2.0.4
              
             
                 
      
       org.springframework
                  
      
       spring-jdbc
                  
      
       5.2.6.RELEASE
              
             
                 
      
       mysql
                  
      
       mysql-connector-java
                  
      
       8.0.18

配置

1、web.xml


   
       
        
            
     
      contextConfigLocation
             
     
      classpath:applicationContext.xml
         
        
            
     
      org.springframework.web.context.ContextLoaderListener
         
        
        
            
     
      spring-mvc
             
     
      org.springframework.web.servlet.DispatcherServlet
             
                 
      
       contextConfigLocation
                  
      
       classpath:spring-mvc.xml
              
             
             
     
      1
         
        
            
     
      spring-mvc
             
             
     
      /
         
        
        
            
     
      CharacterEncodingFilter
             
     
      org.springframework.web.filter.CharacterEncodingFilter
             
                 
      
       encoding
                  
      
       utf-8
              
         
        
            
     
      CharacterEncodingFilter
             
     
      /*

2、applicationContext.xml

3、db.properties

driver=com.mysql.cj.jdbc.Driverurl=jdbc:mysql://localhost:3306/datausername=rootpassword=123456

4、spring-mvc.xml

5、mybatis-config.xml

6、user.mapper.xml


   
       
        
        
        
        
    
             insert into users(name, password) values(#{name}, #{password})    
        
    
             delete from users where id = #{id}    
        
    
             update users set name = #{name}, password = #{password} where id = #{id}

实体类

package com.pengshiyu.vo;public class User {
       private int id;    private String name;    private String password;    public User(int id, String name, String password) {
           this.id = id;        this.name = name;        this.password = password;    }    public User() {
       }    public int getId() {
           return id;    }    public void setId(int id) {
           this.id = id;    }    public String getPassword() {
           return password;    }    public void setPassword(String password) {
           this.password = password;    }    public String getName() {
           return name;    }    public void setName(String name) {
           this.name = name;    }    @Override    public String toString() {
           return "User{" +                "id=" + id +                ", name='" + name + '\'' +                ", password='" + password + '\'' +                '}';    }}

Dao

package com.pengshiyu.dao;import com.pengshiyu.vo.User;import java.util.List;public interface UserDao {
       public List
   
     list();    public User detail(int id);    public int delete(int id);    public int update(User user);    public int insert(User user);}

实现类

package com.pengshiyu.dao.impl;import com.pengshiyu.dao.UserDao;import com.pengshiyu.vo.User;import org.apache.ibatis.session.SqlSessionFactory;import org.mybatis.spring.support.SqlSessionDaoSupport;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import java.util.List;@Repository("userDao")public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {
       @Autowired    @Override    public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
           super.setSqlSessionFactory(sqlSessionFactory);    }    public List
   
     list() {
           return getSqlSession().selectList("com.pengshiyu.vo.user.mapper.selectList");    }    public User detail(int id) {
           return getSqlSession().selectOne("com.pengshiyu.vo.user.mapper.selectOne", id);    }    public int delete(int id) {
           return getSqlSession().delete("com.pengshiyu.vo.user.mapper.delete", id);    }    public int update(User user) {
           return getSqlSession().update("com.pengshiyu.vo.user.mapper.update", user);    }    public int insert(User user) {
           return getSqlSession().insert("com.pengshiyu.vo.user.mapper.insert", user);    }}

Service

package com.pengshiyu.service;import com.pengshiyu.vo.User;import java.util.List;public interface UserService {
       public List
   
     list();    public User detail(int id);    public int delete(int id);    public int update(User user);    public int insert(User user);}

实现类

package com.pengshiyu.service.impl;import com.pengshiyu.dao.UserDao;import com.pengshiyu.service.UserService;import com.pengshiyu.vo.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.List;@Service("userService")public class UserServiceImpl implements UserService {
       @Autowired    private UserDao userDao;    public void setUserDao(UserDao userDao) {
           this.userDao = userDao;    }    public List
   
     list() {
           return userDao.list();    }    public User detail(int id) {
           return userDao.detail(id);    }    public int delete(int id) {
           return userDao.delete(id);    }    public int update(User user) {
           return userDao.update(user);    }    public int insert(User user) {
           return userDao.insert(user);    }}

Controller

package com.pengshiyu.controller;import com.pengshiyu.service.UserService;import com.pengshiyu.vo.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.ModelMap;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import java.io.IOException;import java.util.List;@Controller@RequestMapping("/user")public class UserController {
       @Autowired    private UserService userService;    public void setUserService(UserService userService) {
           this.userService = userService;    }    @RequestMapping("/list")    public String list(ModelMap modelMap) throws IOException {
           List
   
     list = userService.list();        System.out.println(list);        modelMap.addAttribute("list", list);        return "/list.jsp";    }    @RequestMapping("/detail")    public String detail(int id, ModelMap modelMap) throws IOException {
           User user = userService.detail(id);        modelMap.addAttribute("user", user);        return "/detail.jsp";    }    @RequestMapping("/update")    public String update(int id, ModelMap modelMap) throws IOException {
           User user = userService.detail(id);        modelMap.addAttribute("title", "修改");        modelMap.addAttribute("user", user);        return "/edit.jsp";    }    @RequestMapping("/add")    public String add(ModelMap modelMap) throws IOException {
           User user = new User();        modelMap.addAttribute("title", "添加");        modelMap.addAttribute("user", user);        return "/edit.jsp";    }    @RequestMapping("/delete")    public String delete(int id) throws IOException {
           userService.delete(id);        return "redirect:list";    }    @RequestMapping(value = "/edit", method = RequestMethod.POST)    public String edit(User user, ModelMap modelMap) throws IOException {
           if (user.getId() != 0) {
               userService.update(user);        } else {
               userService.insert(user);        }        return "redirect:detail?id=" + user.getId();    }}

拦截器

此项目中并没有配置生效

package com.pengshiyu.interceptor;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.util.List;public class MyInterceptor implements HandlerInterceptor {
       private List
   
     allowedUrls;    // 在请求处理的方法执行之前执行，    // 返回true执行下一个拦截器，    // 返回false不执行下一个拦截器    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
           System.out.println("preHandle");        // 解决中文打印乱码输出        response.setContentType("text/html;charset=utf-8");        // 判断session        Object user = request.getSession().getAttribute("user");        if(user != null){
               return true;        }        // 判断放行路径        String url = request.getRequestURL().toString();        System.out.println(url);        for(String temp: allowedUrls){
               if(url.endsWith(temp)){
                   return true;            }        }        // 如果没有登录就重定向到登录页面        response.sendRedirect("/login.do");        return false;    }    // 在处理方法执行之后执行    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
           System.out.println("postHandle");    }    // 在DispatcherServlet 之后执行 清理工作    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
           System.out.println("afterCompletion");    }    public List
    
      getAllowedUrls() {
           return allowedUrls;    }    public void setAllowedUrls(List
     
       allowedUrls) {
           this.allowedUrls = allowedUrls;    }}

页面

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%> <%@ taglib prefix="c"uri="http://java.sun.com/jsp/jstl/core" %>list
       
   
   
                     编号           姓名           密码           详细           删除        
                   ${item.id}             ${item.name}             ${item.password}             详细             修改             删除

编号	姓名	密码	详细	删除
${item.id}	${item.name}	${item.password}	详细	修改	删除

detail.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%> <%@ taglib prefix="c"uri="http://java.sun.com/jsp/jstl/core" %>detail
  返回列表
id: ${user.id}
name: ${user.name}
password: ${user.password}

edit.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%> <%@ taglib prefix="c"uri="http://java.sun.com/jsp/jstl/core" %>${title}
  返回列表
     
      
        name      
  
        password

项目代码

https://gitee.com/mouday/spring-springmvc-mybatis-demo

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整合 SSM

依赖

配置

实体类

Dao

Service

Controller

拦截器

页面

list

detail

${title}

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