private boolean clearStationInfo() { // 清空所有记录
SQLRequestMessage msg = new SQLRequestMessage();
msg.setCommandMode(Constants.MODE_CS_SYN_CLIENT);
msg.setCommandType(Constants.TYPE_CLIENT_SQLBATCHDELETE);
// 从一个表中进行删除操作
/*
msg.setCommandType(Constants.TYPE_CLIENT_SQLDELETE);
msg.setDataBean("District");
msg.setSql("delete from District");
*/
String[] sqlArray = new String[6];
sqlArray[0] = "delete from Station";
sqlArray[1] = "delete from District";
sqlArray[2] = "delete from Train";
sqlArray[3] = "delete from StationDistrictRelation";
sqlArray[4] = "delete from TrainDistrictRelation";
sqlArray[5] = "delete from Plan";
String sqlStr = JsonUtil.array2json(sqlArray);
msg.setSql(sqlStr);
String paprams = "null";
msg.setParams(paprams);
String list = synClientSupport.sqlMessageSend(msg);
if (list == null) return false;
else return true;
}
// 从服务器获取信息.
private void getStationInfo() {
SQLRequestMessage msg = new SQLRequestMessage();
msg.setCommandMode(Constants.MODE_CS_SYN_CLIENT);
msg.setCommandType(Constants.TYPE_CLIENT_SQLQUERY);
msg.setDataBean("Station");
// 不带参数的sql语句的使用方法
msg.setSql("select * from Station order by Station_name "); // limit 16
String paprams = "null"; //
msg.setParams(paprams); // 转换为json字符串进行传递
String listString = synClientSupport.sqlMessageSend(msg); // 同步通信
if (listString == null) { // 此情况不会出现
return;
} else {
List<Station> list = JsonUtil.getList4Json(listString, Station.class);
if (list.size() <= 0) return;
stationData.setData(list);
}
}
// 向服务器发送更新报文
public boolean updateStationInfo(
int downAvailLaneNum, int upAvailLaneNum, String map, String stationName) {
SQLRequestMessage msg = new SQLRequestMessage();
msg.setCommandMode(Constants.MODE_CS_SYN_CLIENT);
msg.setCommandType(Constants.TYPE_CLIENT_SQLUPDATE);
msg.setDataBean("Station");
msg.setSql(
"update Station set Station_downnumber=? ,"
+ "Station_upnumber=?,Station_graph=? where Station_name =?");
if (downAvailLaneNum == 0) downAvailLaneNum = 1;
if (upAvailLaneNum == 0) upAvailLaneNum = 1;
Object[] params = new Object[] {downAvailLaneNum, upAvailLaneNum, map, stationName};
String paprams = JsonUtil.array2json(params);
msg.setParams(paprams);
String list = synClientSupport.sqlMessageSend(msg); // 同步通信
if (list == null) {
return false;
} else {
return true;
}
}
// 参数为车站ID
// 所有相关的记录都将删除. ??????????????
public boolean deleteStationInfo(String stationName) {
SQLRequestMessage msg = new SQLRequestMessage();
msg.setCommandMode(Constants.MODE_CS_SYN_CLIENT);
// 从列车区段表District中获取车站ID等于stationID的所有区段的ID
List<String> districtIDList = new ArrayList<String>();
msg.setCommandType(Constants.TYPE_CLIENT_SQLQUERY);
msg.setDataBean("District");
String sqlStr =
"select * from District where District_startstationname='"
+ stationName
+ "' or District_endstationname='"
+ stationName
+ "'";
msg.setSql(sqlStr);
String paprams = "null";
msg.setParams(paprams);
String listString = synClientSupport.sqlMessageSend(msg);
if (listString == null) { // 此情况不会出现
districtIDList = null;
} else {
List<District> list = JsonUtil.getList4Json(listString, District.class);
if (list.size() <= 0) districtIDList = null;
else {
for (int i = 0; i < list.size(); i++) {
District data = (District) list.get(i);
districtIDList.add(data.getDistrict_name());
}
}
}
// 从列车表Train中获取车站ID等于stationID的所有车次的ID
List<String> trainIDList = new ArrayList<String>();
msg.setDataBean("Train");
sqlStr =
"select * from Train where Train_startstationname='"
+ stationName
+ "' or Train_endstationname='"
+ stationName
+ "'";
msg.setSql(sqlStr);
paprams = "null";
msg.setParams(paprams);
listString = synClientSupport.sqlMessageSend(msg);
if (listString == null) { // 此情况不会出现
trainIDList = null;
} else {
List<Train> list = JsonUtil.getList4Json(listString, Train.class);
if (list.size() <= 0) trainIDList = null;
else {
for (int i = 0; i < list.size(); i++) {
Train data = (Train) list.get(i);
trainIDList.add(data.getTrain_name());
}
}
}
// 批量删除
// 涉及到的表:Station, District Train StationDistrictRelation TrainDistrictRelation
int districtNumber = 0;
int trainNumber = 0;
if (districtIDList != null) districtNumber = districtIDList.size();
if (trainIDList != null) trainNumber = trainIDList.size();
String[] sqlArray = new String[5 + districtNumber * 2 + trainNumber];
int index = 0;
sqlArray[index++] = "delete from Station where Station_name='" + stationName + "'"; // number 1
sqlArray[index++] =
"delete from StationDistrictRelation where Station_name='" + stationName + "'"; // number 1
sqlArray[index++] =
"delete from Plan where Station_name='"
+ stationName
+ "' or Prestation_name='"
+ stationName
+ "'"; // number 1
if (districtIDList != null) {
sqlArray[index++] =
"delete from District where District_startstationname='"
+ stationName
+ "' or District_endstationname='"
+ stationName
+ "'"; // number 1
for (int i = 0; i < districtNumber; i++) { // number districtNumber*2
sqlArray[index++] =
"delete from StationDistrictRelation where District_name='"
+ districtIDList.get(i)
+ "'";
sqlArray[index++] =
"delete from TrainDistrictRelation where District_name='" + districtIDList.get(i) + "'";
}
}
if (trainIDList != null) {
sqlArray[index++] =
"delete from Train where Train_startstationname='"
+ stationName
+ "' or Train_endstationname='"
+ stationName
+ "'"; // number 1
for (int i = 0; i < trainNumber; i++) { // number trainNumber
sqlArray[index++] =
"delete from TrainDistrictRelation where Train_name='" + trainIDList.get(i) + "'";
}
}
msg.setCommandType(Constants.TYPE_CLIENT_SQLBATCHDELETE);
sqlStr = JsonUtil.array2json(sqlArray);
msg.setSql(sqlStr);
paprams = "null";
msg.setParams(paprams);
listString = synClientSupport.sqlMessageSend(msg); // 同步通信
if (listString == null) {
return false;
} else {
return true;
}
}