SpringMVC+Mybatis架构下的增删查改

第一步新建一个Controller,以产品信息为例(ProductController)

package com.xcy.ctrl;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/Product")
public class ProductController {

	@RequestMapping("/index")
	public ModelAndView index(HttpServletRequest req, HttpServletResponse res){
		ModelAndView mv = new ModelAndView();//mv初始化
		mv.setViewName("true");//设定访问页面为 true.jsp
		return mv;
	}
}

第二步建Service, 它只是一个接口，真正是通过ServiceImpl实现

＊＊在public class productInfoServiceImpl implements ProductInfoService之前要有@Service进行注解

package com.xcy.service;

import java.util.List;

import com.xcy.bean.ProductInfo;

public interface ProductInfoService {
	public List<ProductInfo> getAllProduct();//获得所有产品信息列表

}

package com.xcy.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.xcy.bean.ProductInfo;
import com.xcy.mapper.ProductInfoMapper;
import com.xcy.service.ProductInfoService;

@Service
public class ProductInfoServiceImpl implements ProductInfoService{
//	@Autowired
//	public ProductInfoMapper chanpin;
	@Override
	public List<ProductInfo> getAllProduct() {
		// TODO Auto-generated method stub
		//return chanpin.queryAll();
		System.out.println("getAllProduct");
		return null;
	}

}

第三步建一个Mapper，它也是一个接口，在 .xml文件中编辑相应的sql语句

package com.xcy.mapper;

import java.util.List;

import com.xcy.bean.ProductInfo;

public interface ProductInfoMapper {
	public List<ProductInfo> queryAll();

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xcy.mapper.ProductInfoMapper">
    <select id="queryAll" parameterType="string" resultType="com.xcy.bean.ProductInfo">
        select * from Product
    </select>
</mapper>

之后要将Product.xml文件引入到mybatisConfig.xml文件中                                                          <mapper resource="spring/mapping/Product.xml"/>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
        
<configuration>
    <settings>
        <setting name="jdbcTypeForNull" value="NULL"/>
    </settings>

    <plugins>
        <plugin interceptor="com.github.miemiedev.mybatis.paginator.OffsetLimitInterceptor">
            <property name="dialectClass" value="com.github.miemiedev.mybatis.paginator.dialect.OracleDialect"/>
        </plugin>
    </plugins>

    <mappers>
        <mapper resource="spring/mapping/Users.xml"/>
        <mapper resource="spring/mapping/Cost.xml"/>
        <mapper resource="spring/mapping/Student.xml"/>
	<mapper resource="spring/mapping/Category.xml"/>
	<mapper resource="spring/mapping/Product.xml"/>
    </mappers>
</configuration>

第四步 查询产品详细信息

for(int i = 0; i< list.size() ;i++){

ProductInfo c = list.get(i);

System.out.println("Id:"+ c.getId() +

"  Name:" + c.getName() + " Spec:"+ c.getSpec()

+ " Price:" + c.getPrice());

}//输出每个产品的编号、名称、规格、价格

package com.xcy.ctrl;

import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.xcy.bean.ProductInfo;
import com.xcy.service.ProductInfoService;

@Controller
@RequestMapping("/Product")
public class ProductController {

	@Autowired
	public ProductInfoService cp;

	@RequestMapping("/index")
	public ModelAndView index(HttpServletRequest req, HttpServletResponse res){
		ModelAndView mv = new ModelAndView();//mv初始化
		mv.setViewName("true");//设定访问页面为 true.jsp
		List<ProductInfo> list = cp.getAllProduct();//获得所有产品信息列表
			for(int i = 0; i< list.size() ;i++){
				ProductInfo c = list.get(i);
				System.out.println("Id:"+ c.getId() + 
						"  Name:" + c.getName() + " Spec:"+ c.getSpec()
						+ " Price:" + c.getPrice());
			}//输出每个产品的编号、名称、规格、价格

		return mv;
	}
}

第五步新增产品信息