SSM-MyBatis-10:Mybatis中SqlSession的getMapper()和简单的工具类MyBatisUtils

 

 

------------吾亦无他,唯手熟尔,谦卑若愚,好学若饥-------------

 

 

getMapper的作用,获取到接口,直接通过点的方式调用方法,以免直接手打的方式写错方法名,(强类型的方式)

例子:

 

IBookDAO mapper = session.getMapper(IBookDAO.class);
            List<Book> list = mapper.findAllBook();

 

那个工具类,主要是获取SqlSession对象,写法

 

package cn.dawn.util;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

/**
 * Created by Dawn on 2018/2/24.
 */
public class MyBatisUtils {

    static String path = "mybatis-config.xml";
    static InputStream e;
    static SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
    static SqlSessionFactory factory;
    static {
        try {
            e = Resources.getResourceAsStream(path);
            factory = builder.build(e);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }


    public static SqlSession getSession(){
        return factory.openSession();
    }
}

 

他这个方法怎么使用呢?

如下:

 

SqlSession session= MyBatisUtils.getSession();

 

posted @ 2018-02-24 19:47  晨曦Dawn  阅读(763)  评论(0编辑  收藏  举报