idea ssm项目的搭建（maven）

需求分析：搭建ssm项目实现前台对后台数据库（还是老朋友student表）的操作。

idea版本：2020.3.4

三层架构：   springmvc：视图层     spring：服务层     mybatis：持久层

1.新建工程

 2.导入依赖

 
 javax.servlet
 javax.servlet-api
 3.1.0
 provided
 
 
 
 javax.servlet.jsp
 jsp-api
 2.2.1-b03
 provided
 
 
 
 org.springframework
 spring-webmvc
 5.2.5.RELEASE
 
 
 
 org.springframework
 spring-tx
 5.2.5.RELEASE
 
 
 org.springframework
 spring-jdbc
 5.2.5.RELEASE
 
 
 
 org.springframework
 spring-aspects
 5.2.5.RELEASE
 
 
 
 com.fasterxml.jackson.core
 jackson-core
 2.9.0
 
 
 com.fasterxml.jackson.core
 jackson-databind
 2.9.0
 
 
 
 org.mybatis
 mybatis-spring
 1.3.1
 
 
 
 org.mybatis
 mybatis
 3.5.1
 
 
 
 mysql
 mysql-connector-java
 5.1.9
 
 
 
 com.alibaba
 druid
 1.1.12
 

3.插件

 
 
 src/main/java
 
 **/*.properties
 **/*.xml
 
 false
 
 
 
 
 maven-compiler-plugin
 3.1
 
 1.8
 1.8
 
 

4.数据库准备（id自动递增） 

5.项目包结构

 6.Jdbc 属性配置文件 jdbc.properties

jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.passwd=1111

7.Spring 配置文件 applicationContext.xml

8.Springmvc 配置文件：springmvc.xml

9.mybatis.xml

10.web.xml

  
    springmvc
    org.springframework.web.servlet.DispatcherServlet
    
      contextConfigLocation
      classpath:conf/springmvc.xml
    
    1
  
  
    springmvc
    *.do
  


  
    contextConfigLocation
    classpath:conf/applicationContext.xml
  
  
    org.springframework.web.context.ContextLoaderListener
  


  
    characterEncodingFilter
    org.springframework.web.filter.CharacterEncodingFilter
    
    
      encoding
      utf-8
    
    
      forceRequestEncoding
      true
    
    
      forceResponseEncoding
      true
    
  
  
    characterEncodingFilter
    /*
  

11.实体类 Student

package com.domain;

public class Student {
    private Integer id;
    private String name;
    private String time;

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", time='" + time + '\'' +
                '}';
    }

    public Student(Integer id, String name, String time) {
        this.id = id;
        this.name = name;
        this.time = time;
    }

    public Student() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }
}

12.Dao 接口和 sql 映射文件

StudentDao:

package com.dao;

import com.domain.Student;

import java.util.List;

public interface StudentDao {
    int insertStudent(Student student);
    List selectStudents();
}

StudentDao.xml

    
        select id,name,time from student order by id desc
    
    
        insert into student(name,time) values (#{name},#{time})
    

13.Service 接口和实现类

package com.service;

import com.domain.Student;

import java.util.List;

public interface StudentService {
    int addStudent(Student student);
    List findStudents();
}

 

package com.service.impl;

import com.dao.StudentDao;
import com.domain.Student;
import com.service.StudentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class StudentServiceImpl implements StudentService {
    @Resource
    private StudentDao studentDao;
    @Override
    public int addStudent(Student student) {
        int nums=studentDao.insertStudent(student);
        return nums;
    }

    @Override
    public List findStudents() {
        return studentDao.selectStudents();
    }
}

14.处理器定义

StudentController

package com.controller;

import com.domain.Student;
import com.service.StudentService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import java.util.List;

@RequestMapping("/student")
@Controller
public class StudentController {
    @Resource
    private StudentService service;
    @RequestMapping("/add.do")
    public ModelAndView addStudent(Student student){
        int nums=service.addStudent(student);
        ModelAndView modelAndView=new ModelAndView();
        modelAndView.addObject("nums",nums);
        modelAndView.setViewName("result");
        return modelAndView;
    }
    @ResponseBody
    @RequestMapping(value = "/find.do",produces = "text/plain;charset=utf-8")
    public String findStudents(){
        List students=service.findStudents();
        return students.toString();
    }
}

15.视图层

前端自己写啦，仅展示视图层add.do对应的jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    



        

            

    

                
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提示：input的name属性应该与Student对象的属性名一一对应，这样做在视图层springmvc框架会自动调用set方法帮我们把这些属性一一封装到参数对象之中。