C#和JAVA中编写事务代码

C#  DAL层代码，执行多条增删改，使用事务操作：

 /// <summary>
        /// 执行 多条增删改 (非查询语句)
        /// </summary>
        /// <param name="strSql"></param>
        /// <param name="paras"></param>
        /// <returns></returns>
        public static int ExcuteNonQuerys(string[] strSqls, SqlParameter[][] paras2Arr)
        {
            int res = 0;
            //创建连接通道
            using (SqlConnection conn = new SqlConnection(strConn))
            {
                conn.Open();
                //创建 事务
                SqlTransaction tran = conn.BeginTransaction();
                //创建命令对象
                SqlCommand cmd = new SqlCommand();
                //为命令对象指定连接通道
                cmd.Connection = conn;
                //为命令对象指定事务
                cmd.Transaction = tran;
                try
                {
                    //循环执行sql语句
                    for (int i = 0; i < strSqls.Length; i++)
                    {
                        //获得要执行的sql语句
                        string strSql = strSqls[i];
                        //为命令对象指定 此次执行的 sql语句
                        cmd.CommandText = strSql;
                        //添加参数
                        if (paras2Arr.Length > i)//如果 参数2维数组的长度大于当前循环的下标
                        {
                            cmd.Parameters.AddRange(paras2Arr[i]);//将 交错数组 的第一个元素（其实也是一个数组，添加到参数集合中）
                        }
                        res += cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();
                    }
                    tran.Commit();//提交事务
                }
                catch (Exception ex)
                {
                    res = 0;
                    tran.Rollback();//回滚事务
                    throw ex;
                }
            }
            return res;
        }

JAVA  DAO层中编写事务代码：

@Test
	public void test(){
		Connection conn = null;
		PreparedStatement stmt = null;
		Savepoint sp = null;
		try{
			conn = JdbcUtil.getConnection();
			conn.setAutoCommit(false);    //开启事务
			stmt = conn.prepareStatement("update account set money=money-100 where name='aaa'");
			stmt.executeUpdate();

			stmt = conn.prepareStatement("update account set money=money+100 where name='bbb'");
			stmt.executeUpdate();

			sp = conn.setSavepoint();//设置回滚点

			stmt = conn.prepareStatement("update account set money=money-100 where name='bbb'");
			stmt.executeUpdate();
			int i=1/0;            //bbb给ccc转账时遇到异常
			stmt = conn.prepareStatement("update account set money=money+100 where name='ccc'");
			stmt.executeUpdate();

		}catch(Exception e){
			e.printStackTrace();
			try {
				conn.rollback(sp);   //回滚事务
			} catch (SQLException e1) {
				e1.printStackTrace();
			}
		}finally{
			try {
				conn.commit();      //事务提交
			} catch (SQLException e) {
				e.printStackTrace();
			}
			JdbcUtil.release(null, stmt, conn);
		}
	}

JAVA  Service层使用事务操作代码：

import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSourceFactory;
//把得到连接及事务有关的方法写到此类中
public class TransactionUtil {
	private static ThreadLocal<Connection> tl = new ThreadLocal<Connection>();

	private static DataSource ds;
	static{
		try {
			InputStream in = DBCPUtil.class.getClassLoader().getResourceAsStream("dbcpconfig.properties");
			Properties props = new Properties();
			props.load(in);
			ds = BasicDataSourceFactory.createDataSource(props);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static DataSource getDataSource(){
		return ds;
	}
	public static Connection getConnection(){
		try {
			Connection conn = tl.get();
			if(conn==null){
				conn = ds.getConnection();
				tl.set(conn);
			}
			return conn;
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}
	public static void startTransaction(){
		try {
			Connection conn = tl.get();
			if(conn==null){
				conn = getConnection();
//				tl.set(conn);
			}
			conn.setAutoCommit(false);
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}
	public static void rollback(){
		try {
			Connection conn = tl.get();
			if(conn==null){
				conn = getConnection();
//				tl.set(conn);
			}
			conn.rollback();
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}
	public static void commit(){
		try {
			Connection conn = tl.get();
			if(conn==null){
				conn = getConnection();
//				tl.set(conn);
			}
			conn.commit();
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}
	public static void relase(){
		try {
			Connection conn = tl.get();
			if(conn!=null){
				conn.close();
				tl.remove();
			}
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}
}

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