使用sts搭建ssm项目

1.右键 new -> SpringProject

templates选择  Spring MVC  Project

创建完成如下图所示

2.修改pom.xml文件

	4.0.0
	com.my
	rental
	CarRentalStore
	war
	1.0.0-BUILD-SNAPSHOT
	
		1.8
		4.3.5.RELEASE
		1.6.10
		1.6.6
		
		5.1.47
	
	
		
		
			org.mybatis.generator
			mybatis-generator-core
			1.3.5
		
		
		
			mysql
			mysql-connector-java
			${mysql-driver.version}
		
		
		
			commons-dbcp
			commons-dbcp
			1.2.2
		
		
		
			commons-fileupload
			commons-fileupload
			1.3.1
		

		
			commons-io
			commons-io
			2.4
		

		
			commons-codec
			commons-codec
			1.9
		
		
		
		
			org.mybatis
			mybatis
			3.4.5
		
		
		
			org.mybatis
			mybatis-spring
			1.3.0
		
		
		
			org.springframework.batch
			spring-batch-infrastructure
			3.0.7.RELEASE
		
		
		
			com.github.pagehelper
			pagehelper
			4.1.6
		
		
			com.github.jsqlparser
			jsqlparser
			0.9.5
		

		
		
			org.springframework
			spring-core
			${org.springframework-version}
		
		
			org.springframework
			spring-web
			${org.springframework-version}
		
		
			org.springframework
			spring-oxm
			${org.springframework-version}
		
		
			org.springframework
			spring-tx
			${org.springframework-version}
		
		
			org.springframework
			spring-jdbc
			${org.springframework-version}
		
		
			org.springframework
			spring-webmvc
			${org.springframework-version}
		
		
			org.springframework
			spring-context
			${org.springframework-version}
		
		
			org.springframework
			spring-context-support
			${org.springframework-version}
		
		
			org.springframework
			spring-aop
			${org.springframework-version}
		

		
			org.springframework
			spring-test
			${org.springframework-version}
		

		
		
			com.alibaba
			fastjson
			1.1.41
		
		
		
			org.codehaus.jackson
			jackson-mapper-asl
			1.9.13
		
		
		
			com.fasterxml.jackson.core
			jackson-core
			2.8.0
		
		
		
			com.fasterxml.jackson.core
			jackson-databind
			2.8.0
		

		
		
			org.aspectj
			aspectjrt
			${org.aspectj-version}
		

		
		
			org.slf4j
			slf4j-api
			${org.slf4j-version}
		
		
			org.slf4j
			jcl-over-slf4j
			${org.slf4j-version}
			runtime
		
		
			org.slf4j
			slf4j-log4j12
			${org.slf4j-version}
			runtime
		
		
			log4j
			log4j
			1.2.15
			
				
					javax.mail
					mail
				
				
					javax.jms
					jms
				
				
					com.sun.jdmk
					jmxtools
				
				
					com.sun.jmx
					jmxri
				
			
			runtime
		

		
		
			javax.inject
			javax.inject
			1
		

		
		
			javax.servlet
			servlet-api
			3.0-alpha-1
			provided
		
		
		
			javax.servlet.jsp
			jsp-api
			2.2
			provided
		

		
			javax.servlet
			jstl
			1.2
		

		
		
			junit
			junit
			4.7
			test
		
		
		
		
        io.netty
        netty-all
        4.1.6.Final 
        
        
	
	
	
		
		
			
				maven-eclipse-plugin
				2.9
				
					
						org.springframework.ide.eclipse.core.springnature
					
					
						org.springframework.ide.eclipse.core.springbuilder
					
					true
					true
				
			
			
				org.apache.maven.plugins
				maven-compiler-plugin
				2.5.1
				
					1.8
					1.8
					-Xlint:all
					true
					true
				
			
			
				org.codehaus.mojo
				exec-maven-plugin
				1.2.1
				
					org.test.int1.Main
				
			
			
				org.mybatis.generator
				mybatis-generator-maven-plugin
				1.3.5
				
					
						mysql
						mysql-connector-java
						${mysql-driver.version}
					
				
				
					
					${basedir}/src/main/resources/generatorConfig.xml
					true
				
			
		
	

3.修改spring以及springMVC的配置文件

servlet-context.xml

root-context.xml

在这个配置文件的Namespace中勾选如下选项

	
	
	
	
	
	
	
	
	
	
		
		
		
		
	
	
	
		
		
		
		
			
				
					
						
							dialect=mysql
							reasonable=true
						
					
				
			
		
	
	
	
	
		
	

	
	
	
		
		

4.添加配置文件

mybatis-config.xml （关于mybatis，这个配置文件内容为空，因为关于mybatis的配置已经交给spring管理）

jdbc.properties （关于数据库连接）

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/cartest?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root
maxActive=50
maxIdle=20
maxWait=60000

generatorConfig.xml（关于反向生成）

5.反向生成

选中项目，右键 run as --> maven 

goals :mybatis-generator:generate

运行之后，生成的实体类及mapper如下图

6.修改实体类中关于外键的类型

数据库设计中，外键设置的是int类型，在java类中，外键字段要改成对象类型

 

7.修改mapper.xml中的相关外键配置

举出其中一个例子，注意相关外键的转换，以及外键表中的外键

  
    
    
    
    
    
    
  
  
  
  
  	
  	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
  
  
  
    id, favType, favCar, favPrice
  
  
    select 
    
    from favorable
    where id = #{id,jdbcType=INTEGER}
  
  
    delete from favorable
    where id = #{id,jdbcType=INTEGER}
  
  
    insert into favorable (id, favType, favCar, 
      favPrice)
    values (#{id,jdbcType=INTEGER}, #{favtype.id,jdbcType=INTEGER}, #{favcar.id,jdbcType=INTEGER}, 
      #{favprice,jdbcType=DOUBLE})
  
  
    insert into favorable
    
      
        id,
      
      
        favType,
      
      
        favCar,
      
      
        favPrice,
      
    
    
      
        #{id,jdbcType=INTEGER},
      
      
        #{favtype.id,jdbcType=INTEGER},
      
      
        #{favcar.id,jdbcType=INTEGER},
      
      
        #{favprice.id,jdbcType=DOUBLE},
      
    
  
  
    update favorable
    
      
        favType = #{favtype.id,jdbcType=INTEGER},
      
      
        favCar = #{favcar.id,jdbcType=INTEGER},
      
      
        favPrice = #{favprice,jdbcType=DOUBLE},
      
    
    where id = #{id,jdbcType=INTEGER}
  
  
    update favorable
    set favType = #{favtype.id,jdbcType=INTEGER},
      favCar = #{favcar.id,jdbcType=INTEGER},
      favPrice = #{favprice,jdbcType=DOUBLE}
    where id = #{id,jdbcType=INTEGER}
  

8.在mapper.java中添加自定义方法以及注释,在mapper.xml中添加对应sql

package com.my.mapper;

import java.util.List;

import org.springframework.stereotype.Repository;

import com.my.domain.Car;

//@Repository注解的作用：被作为持久层操作（数据库）的bean来使用

@Repository("CarMapper")
public interface CarMapper {
	
    //自定义方法，在mapper.xml中要有相对应的sql
	List findAll();
	
    int deleteByPrimaryKey(Integer id);

    int insert(Car record);

    int insertSelective(Car record);

    Car selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(Car record);

    int updateByPrimaryKey(Car record);
}

  
  	SELECT a.*,b.typeName,c.storeTel,c.storeName,c.storeLocation,c.storeBusHour 
  	FROM car a LEFT JOIN carType b on a.carType = b.id 
	LEFT JOIN carStore c on a.carStore = c.id
  

 

9.编写service

package com.my.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.my.domain.Car;
import com.my.mapper.CarMapper;

//@Service的作用：业务逻辑层注解，这个注解只是标注该类处于业务逻辑层
@Service("CarService")
public class CarService {

	/*
	 * @Autowired顾名思义，就是自动装配，其作用是为了消除代码Java
	 *           代码里面的getter/setter与bean属性中的property。
	 *           当然，getter看个人需求，如果私有属性需要对外提供的话，应当予以保留。
	 *           
	 *  简单来说：@Autowired 自动装配
	 *           @Qualifier("") 按名称装配         
	 */
	@Autowired@Qualifier("CarMapper")
	private CarMapper carMapper;
	
    //@Transactional表示事物
	@Transactional(readOnly=true,propagation=Propagation.REQUIRED)
	public List findAll(){
		return this.carMapper.findAll();
	}

	public CarMapper getCarMapper() {
		return carMapper;
	}

	public void setCarMapper(CarMapper carMapper) {
		this.carMapper = carMapper;
	}
	
}

 

9.编写 controller

package com.my.controller;

import java.util.List;

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 com.my.domain.Car;
import com.my.service.CarService;

/*
 * @Controller ： spring-mvc的注解，具有将请求进行转发，重定向的功能。
 * @RequestMapping： 一个用来处理请求地址映射的注解，可用于类或者方法上。用于类上，表示类中的所有响应请求的方法都是以该地址作为父路径。
 */
@Controller("CarController")
@RequestMapping("/car")
public class CarController {

	@Autowired@Qualifier("CarService")
	private CarService carService;
	@RequestMapping("findAll")
	public String findAll(Model model){
		List carList = this.carService.findAll();
		model.addAttribute("carList", carList);
		
		//表示跳转到views文件夹下的xx路径
		return "car/show";
	}
	
	public CarService getCarService() {
		return carService;
	}

	public void setCarService(CarService carService) {
		this.carService = carService;
	}
	
}

 

 

10.编写jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>








	${car.carname }------${car.carprice } 

	${car.carnum }------${car.carimg } 

	${car.carbrand.brandname }------${car.cartype.typename } 

	${car.carstore.storename }------${car.carstore.storetel } 

	${car.carstore.storelocation }------${car.carstore.storebushour } 

 

11.启动服务，在浏览器输入：http://localhost:8080/rental/car/findAll

完成一个简易的ssm小项目