Question

您好，在我的项目中，我创建了两个表，即Role_header和Role_details表。而Role_details表也指的是Role_header表。

在我的java类中，我有两种方法

insertRoleHeader(...) - ＆gt;将首先调用并设置conn.setAutoCommit（false）.i没有提交此项，因为在此之后我想在Role_details表中插入具有多个记录的role_details。所以如果抛出任何异常，我将首先调用此方法。我把它设置为在catch中回滚。
insertRoleDetails(.....) - ＆gt;这个方法将由forloop调用。每次调用这个方法我都会提交。那时我的错误为java.sql.SQLException: lock wait time out exceeded; try restarting transaction。

我的示例代码在这里：

public void insertHeader(RoleMasterSupport rMS) throws SQLException {
    connectDB();
    Statement stmt = null;

    try {
        roleMasterConn.setAutoCommit(false);
        stmt = roleMasterConn.createStatement();
        String sql = "insert into role_header( create_user, " +
                     "create_date, " +
                     "run_user, " +
                     "run_date, " +
                     "role_id, " +
                     "role_name, "+
                     "remarks) " +
                     "values('"+Constants.sUserName+"', now(), "
                    + "'"+Constants.sUserName+"', now(), "
                    + "'"+rMS.getsRoleID()+"', '"+rMS.getsRoleName()+"', "
                    + "'"+rMS.getsRemarks()+"') ";
        stmt.executeUpdate(sql);
        stmt.close();                   
    } catch (SQLException e) {  
        roleMasterConn.rollback();
        throw e;
    }
}


public void insertDetails(RoleMasterSupport rMS, TableModel model) throws SQLException
{
    for (int i = 0; i < model.getRowCount(); i++) {
        dbop.insertDetail(rMS, rMS.getaLScreenNames().get(i), 
                rMS.getaLAdd().get(i), rMS.getaLView().get(i), 
                rMS.getaLModify().get(i), rMS.getaLDelete().get(i));
    }
}

public void insertDetail(RoleMasterSupport rMS, String sScreenName, String sAdd, String sView, String sModify, String sDelete) throws SQLException
{
    connectDB();
    Statement stmt = null;

    try {
        roleMasterConn.setAutoCommit(false);
        stmt = roleMasterConn.createStatement();
        String sql = "insert into role_details( create_user, " +
                     "create_date, " +
                     "run_user, " +
                     "run_date, " +
                     "role_id, " +
                     "screen_name, " +
                     "modify_screen, " +
                     "add_screen, " +       
                     "delete_screen, " +       
                     "view_screen) " +
                     "values('"+Constants.sUserName+"', now(), "
                     + "'"+Constants.sUserName+"', now(), "
                     + "'"+rMS.getsRoleID()+"', '"+sScreenName+"', "
                     + "'"+sModify+"', '"+sAdd+"', "
                     + "'"+sDelete+"', '"+sView+"') ";
        stmt.executeUpdate(sql);
        roleMasterConn.commit();
    } catch (SQLException e) {
        roleMasterConn.rollback();
        throw e;
    }
}

java.sql.SQLException：超出锁定等待时间;尝试重新启动事务

0 个答案: