整合SSM

整合SSM

1.环境搭建

1. 导入相关的pom依赖

        
        
            com.fasterxml.jackson.core
            jackson-databind
            2.9.8
        
        
        
            com.alibaba
            fastjson
            1.2.62
        
    
        
            org.mybatis
            mybatis
            3.5.2
        
        
            org.mybatis
            mybatis-spring
            2.0.2
        

        
            org.springframework
            spring-webmvc
            5.1.9.RELEASE
        
        
            org.springframework
            spring-jdbc
            5.1.9.RELEASE
        
        
        
            junit
            junit
            4.12
        
        
        
            mysql
            mysql-connector-java
            5.1.47
        
        
        
            com.mchange
            c3p0
            0.9.5.2
        
        
        
            javax.servlet
            servlet-api
            2.5
        
        
            javax.servlet.jsp
            jsp-api
            2.2
        
        
            javax.servlet
            jstl
            1.2
        
        
        
            commons-fileupload
            commons-fileupload
            1.3.3
        
        
        
            javax.servlet
            javax.servlet-api
            4.0.1
        

2. Maven资源过滤设置

   
       
           src/main/java
           
               **/*.properties
               **/*.xml
           
           false
       
       
           src/main/resources
           
               **/*.properties
               **/*.xml
           
           false
       
   

3. 建立基本结构

java目录下

• com.lgw.dao
• com.lgw.pojo
• com.lgw.service
• com.lgw.controller

resources目录下

• mapper
• mybatis
• spring

4. 配置框架

mybatis目录下：mybatis-config.xml

Spring目录下：applicationContext.xml

Spring目录下:spirng-dao.xml

Spring目录下:spirng-service.xml

Spring目录下:spirng-mvc.xml

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

log4j ....

2.Mybatis层

Mybatis-config.xml

pojo实体类(在此省略方法)

package com.lgw.pojo;

public class Admin {
    private int adminId;
    private String adminName;
    private String adminPassword;
}

dao层Mapper接口

package com.lgw.dao.admin;


import com.lgw.pojo.Admin;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import java.util.List;
import java.util.Map;

@Repository
public interface AdminMapper {
    /**
     * 查询所有管理员
     * @return
     */
    List  QueryAdmins();


    Admin QueryAdminById(@Param("id") int id);
    /**
     * 增加一个管理员
     * @param admin
     * @return
     */
    int addAdmin(Admin admin);

    /** 删除一个管理员
     * @param id
     * @return
     */
    int deleteAdmin(@Param("id") int id);

    /** 删除一个管理员
     * @param map
     * @return
     */
    int updateAdmin(Map map);
}

对应的*Mapper.xml

    
     select admin_id,admin_name,admin_password from admin
 

    
   select admin_id,admin_name,admin_password from admin where admin_id=#{id}


    
  insert into admin values(admin_name,admin_password)


    
    delete from admin where admin_id=#{id}


    
    update admin set  admin_name=#{name} admin_password=#{password}
    WHERE admin_id = #{id}

编写Service层的接口和实现类

接口

package com.lgw.service.admin;

import com.lgw.pojo.Admin;
import java.util.List;
import java.util.Map;

public interface AdminService {
    /**
     * 查询所有管理员
     * @return
     */
    List QueryAdmins();

    Admin QueryAdminById( int id);

    /**
     * 增加一个管理员
     * @param admin
     * @return
     */
    int addAdmin(Admin admin);

    /** 删除一个管理员
     * @param id
     * @return
     */
    int deleteAdmin(int id);

    /** 删除一个管理员
     * @param map
     * @return
     */
    int updateAdmin(Map map);
}

实现类

package com.lgw.service.admin;

import com.lgw.dao.admin.AdminMapper;
import com.lgw.pojo.Admin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;


public class AdminServiceImpl implements AdminService {
//    service层调dao层

    private AdminMapper adminMapper;

    public void setAdminMapper(AdminMapper adminMapper) {
        this.adminMapper = adminMapper;
    }

    public List QueryAdmins() {
        return adminMapper.QueryAdmins();
    }

    public Admin QueryAdminById(int id) {
        return adminMapper.QueryAdminById(id);
    }

    public int addAdmin(Admin admin) {
        return adminMapper.addAdmin(admin);
    }

    public int deleteAdmin(int id) {
        return adminMapper.deleteAdmin(id);
    }

    public int updateAdmin(Map map) {
        return adminMapper.updateAdmin(map);
    }
}

3.Spring层

整合Mybtais配置文件

spring-dao.xml

Mapper接口加注解，纳入Spring管理

@Repository
public interface AdminMapper {

}

Spring整合Service层

Service层实现类注解

@Service
public class AdminServiceImpl implements AdminService {
//    service层调dao层
    @Autowired
    @Qualifier("adminMapper")
    private AdminMapper adminMapper;
    }

4.SpringMVC层

1. 配置web.xml

    
        index.jsp
    
    
    
        SpringMVC
        org.springframework.web.servlet.DispatcherServlet
        
            contextConfigLocation
            classpath:spring/applicationContext.xml
        
        1
    
    
        SpringMVC
        /
    
    
    
    
        encoding-fiflter
        org.springframework.web.filter.CharacterEncodingFilter
        
            encoding
            UTF-8
        
    
    
        encoding-fiflter
        /*
    

    
        15
    

2. spring-mvc.xml

3. Spring配置文件整合 applicationContext.xml

4. 代码编写

controller层

package com.lgw.controller;

import com.lgw.pojo.Admin;
import com.lgw.service.admin.AdminService;
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 org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class AdminController {
//    Controller 调用service
    @Autowired
    @Qualifier("adminServiceImpl")
    private AdminService adminService;
    @RequestMapping("/admin/all")
    public String allAdmins(Model model){
        List admins = adminService.QueryAdmins();
        model.addAttribute("admins",admins);
        return "Admins";
    }
}

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>



   
   




   查询管理员

在web-inf下创建view/Admin.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


${admins}

基本的SSM框架搭建成功，开始测业务了