package com.fmg.utils;

import org.apache.ibatis.session.SqlSession;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class TransactionInvocationHandle implements InvocationHandler {
    private Object target;

    public TransactionInvocationHandle(Object target) {
        this.target = target;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        SqlSession sqlSession = null;
        Object obj = null;
        try {
            sqlSession = SqlSessionUtil.getSession();
            obj = method.invoke(target, args);
            sqlSession.commit();
        } catch (Exception e) {
           e.printStackTrace();
        } finally {
            SqlSessionUtil.myClose(sqlSession);
        }
        return  obj;
    }

    public Object getProxy() {
        return Proxy.newProxyInstance(target.getClass().getClassLoader(),
                target.getClass().getInterfaces(), this);
    }
}

package com.fmg.utils;

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;

public class SqlSessionUtil {
    private static SqlSessionFactory sqlSessionFactory;

    // 线程池
    static ThreadLocal<SqlSession> t = new ThreadLocal<>();

    // 加载工厂
    static {
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
        } catch (IOException e) {
            e.printStackTrace();
        }
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
    }

    // 创建session对象
    public static SqlSession getSession() {
        SqlSession sqlSession = t.get();
        if (sqlSession == null) {
            sqlSession = sqlSessionFactory.openSession();
            t.set(sqlSession);
        }
        return sqlSession;
    }

    // 关闭对话
    public static void myClose(SqlSession sqlSession) {
        if (sqlSession != null) {
            sqlSession.close();
            t.remove();
        }
    }
}

package com.fmg.utils;

public class ServiceFactory {
    public Object getService(Object obj) {
        return new TransactionInvocationHandle(obj).getProxy();
    }
}