System.out.println(e.toString()); mResult = false;什么意思啊

java.sql.PreparedStatement prestmt = null;
try {
prestmt = DbaObj.Conn.prepareStatement(Sql);
prestmt.setString(1, mRecordID);
prestmt.setString(2, mFileName);
prestmt.setString(3, mFileType);
prestmt.setInt(4, mFileSize);
prestmt.setString(5, mFileDate);
prestmt.setBytes(6, mFileBody);
prestmt.setString(7, mFilePath);
prestmt.setString(8, mUserName);
prestmt.setString(9, mDescript); //"通用版本"
DbaObj.Conn.setAutoCommit(true);
prestmt.execute();
DbaObj.Conn.commit();
prestmt.close();
mResult = true;
}
catch (SQLException e) {
System.out.println(e.toString());
mResult = false;
}
}这段看不懂 谁帮我解释下啊

System.out.println(e.toString());
若访问数据库出错错误被catch到之后
输出错误信息
但是一般都会这么写 e.printStackTrace()
mResult = false;
表示数据库访问成功与否

System.out.println(e.toString()); 输出程序的异常信息 mResult 应该是返回的标识，true标识成功，false标识失败

java.sql.PreparedStatement prestmt = null;//设置prestmt里面所有的值为空 try { prestmt = DbaObj.Conn.prepareStatement(Sql);//链接sql语句 prestmt.setString(1, mRecordID);//把ID的值赋予里面的第一个字符 prestmt.setString(2, mFileName); prestmt.setString(3, mFileType); prestmt.setInt(4, mFileSize); prestmt.setString(5, mFileDate); prestmt.setBytes(6, mFileBody); prestmt.setString(7, mFilePath); prestmt.setString(8, mUserName); prestmt.setString(9, mDescript); //"通用版本" DbaObj.Conn.setAutoCommit(true);//更改后自动提交 prestmt.execute(); DbaObj.Conn.commit();//提交 prestmt.close();//关闭 mResult = true; } catch (SQLException e) { System.out.println(e.toString()); mResult = false; } } 后面一段是抛出异常