java 创建 modbus从机 java解析modbus-摩杜云开发者社区

程序员必备Java ModBus的使用方法和操作实例
最近有很多程序员朋友说关于Java ModBus的使用方法要怎么要怎么操作，问我有没有实际的操作案例，今天刚好有时间就来和大家分享一下这个操作案例，希望能帮到大家。
实例说明：
主要用于JAVA 对ModBus以及串口的通讯操作
1，Test类用于接收数采仪数据，然后核对其CRC校验是否正确，不正确便丢弃，不作任何操作，正确就查找其设备号对应哪个站点，以及其检测指标。然后到DB中查找实时检测值，若未有实时数据可用本实例中的随机数代替，然后保存发送数据到数据库中。得到值后通过CRC16得到其校验码组成其要发送的字节，发送完毕。
2，主要涉及到的类有3个
DB.java 用户得到实时数据，保存发送数据到数据库中
Test.java 用户接收数采仪值，通过com串口发送到数采仪
ModBus的CRC16校验法
数采仪是参照国际HJ/T212-2005
CRC.javal类代码如下：
public class CRC16 {
static final String HEXES = “0123456789ABCDEF”;
byte uchCRCHi = (byte) 0xFF;
byte uchCRCLo = (byte) 0xFF;
private static byte[] auchCRCHi = { 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01,
(byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01,
(byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80,
(byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01,
(byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80,
(byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x01,
(byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80,
(byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00, (byte) 0xC1,
(byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80,
(byte) 0x41, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x00, (byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40, (byte) 0x01, (byte) 0xC0,
(byte) 0x80, (byte) 0x41, (byte) 0x00, (byte) 0xC1, (byte) 0x81,
(byte) 0x40, (byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41,
(byte) 0x01, (byte) 0xC0, (byte) 0x80, (byte) 0x41, (byte) 0x00,
(byte) 0xC1, (byte) 0x81, (byte) 0x40 };
private static byte[] auchCRCLo = { (byte) 0x00, (byte) 0xC0, (byte) 0xC1,
(byte) 0x01, (byte) 0xC3, (byte) 0x03, (byte) 0x02, (byte) 0xC2,
(byte) 0xC6, (byte) 0x06, (byte) 0x07, (byte) 0xC7, (byte) 0x05,
(byte) 0xC5, (byte) 0xC4, (byte) 0x04, (byte) 0xCC, (byte) 0x0C,
(byte) 0x0D, (byte) 0xCD, (byte) 0x0F, (byte) 0xCF, (byte) 0xCE,
(byte) 0x0E, (byte) 0x0A, (byte) 0xCA, (byte) 0xCB, (byte) 0x0B,
(byte) 0xC9, (byte) 0x09, (byte) 0x08, (byte) 0xC8, (byte) 0xD8,
(byte) 0x18, (byte) 0x19, (byte) 0xD9, (byte) 0x1B, (byte) 0xDB,
(byte) 0xDA, (byte) 0x1A, (byte) 0x1E, (byte) 0xDE, (byte) 0xDF,
(byte) 0x1F, (byte) 0xDD, (byte) 0x1D, (byte) 0x1C, (byte) 0xDC,
(byte) 0x14, (byte) 0xD4, (byte) 0xD5, (byte) 0x15, (byte) 0xD7,
(byte) 0x17, (byte) 0x16, (byte) 0xD6, (byte) 0xD2, (byte) 0x12,
(byte) 0x13, (byte) 0xD3, (byte) 0x11, (byte) 0xD1, (byte) 0xD0,
(byte) 0x10, (byte) 0xF0, (byte) 0x30, (byte) 0x31, (byte) 0xF1,
(byte) 0x33, (byte) 0xF3, (byte) 0xF2, (byte) 0x32, (byte) 0x36,
(byte) 0xF6, (byte) 0xF7, (byte) 0x37, (byte) 0xF5, (byte) 0x35,
(byte) 0x34, (byte) 0xF4, (byte) 0x3C, (byte) 0xFC, (byte) 0xFD,
(byte) 0x3D, (byte) 0xFF, (byte) 0x3F, (byte) 0x3E, (byte) 0xFE,
(byte) 0xFA, (byte) 0x3A, (byte) 0x3B, (byte) 0xFB, (byte) 0x39,
(byte) 0xF9, (byte) 0xF8, (byte) 0x38, (byte) 0x28, (byte) 0xE8,
(byte) 0xE9, (byte) 0x29, (byte) 0xEB, (byte) 0x2B, (byte) 0x2A,
(byte) 0xEA, (byte) 0xEE, (byte) 0x2E, (byte) 0x2F, (byte) 0xEF,
(byte) 0x2D, (byte) 0xED, (byte) 0xEC, (byte) 0x2C, (byte) 0xE4,
(byte) 0x24, (byte) 0x25, (byte) 0xE5, (byte) 0x27, (byte) 0xE7,
(byte) 0xE6, (byte) 0x26, (byte) 0x22, (byte) 0xE2, (byte) 0xE3,
(byte) 0x23, (byte) 0xE1, (byte) 0x21, (byte) 0x20, (byte) 0xE0,
(byte) 0xA0, (byte) 0x60, (byte) 0x61, (byte) 0xA1, (byte) 0x63,
(byte) 0xA3, (byte) 0xA2, (byte) 0x62, (byte) 0x66, (byte) 0xA6,
(byte) 0xA7, (byte) 0x67, (byte) 0xA5, (byte) 0x65, (byte) 0x64,
(byte) 0xA4, (byte) 0x6C, (byte) 0xAC, (byte) 0xAD, (byte) 0x6D,
(byte) 0xAF, (byte) 0x6F, (byte) 0x6E, (byte) 0xAE, (byte) 0xAA,
(byte) 0x6A, (byte) 0x6B, (byte) 0xAB, (byte) 0x69, (byte) 0xA9,
(byte) 0xA8, (byte) 0x68, (byte) 0x78, (byte) 0xB8, (byte) 0xB9,
(byte) 0x79, (byte) 0xBB, (byte) 0x7B, (byte) 0x7A, (byte) 0xBA,
(byte) 0xBE, (byte) 0x7E, (byte) 0x7F, (byte) 0xBF, (byte) 0x7D,
(byte) 0xBD, (byte) 0xBC, (byte) 0x7C, (byte) 0xB4, (byte) 0x74,
(byte) 0x75, (byte) 0xB5, (byte) 0x77, (byte) 0xB7, (byte) 0xB6,
(byte) 0x76, (byte) 0x72, (byte) 0xB2, (byte) 0xB3, (byte) 0x73,
(byte) 0xB1, (byte) 0x71, (byte) 0x70, (byte) 0xB0, (byte) 0x50,
(byte) 0x90, (byte) 0x91, (byte) 0x51, (byte) 0x93, (byte) 0x53,
(byte) 0x52, (byte) 0x92, (byte) 0x96, (byte) 0x56, (byte) 0x57,
(byte) 0x97, (byte) 0x55, (byte) 0x95, (byte) 0x94, (byte) 0x54,
(byte) 0x9C, (byte) 0x5C, (byte) 0x5D, (byte) 0x9D, (byte) 0x5F,
(byte) 0x9F, (byte) 0x9E, (byte) 0x5E, (byte) 0x5A, (byte) 0x9A,
(byte) 0x9B, (byte) 0x5B, (byte) 0x99, (byte) 0x59, (byte) 0x58,
(byte) 0x98, (byte) 0x88, (byte) 0x48, (byte) 0x49, (byte) 0x89,
(byte) 0x4B, (byte) 0x8B, (byte) 0x8A, (byte) 0x4A, (byte) 0x4E,
(byte) 0x8E, (byte) 0x8F, (byte) 0x4F, (byte) 0x8D, (byte) 0x4D,
(byte) 0x4C, (byte) 0x8C, (byte) 0x44, (byte) 0x84, (byte) 0x85,
(byte) 0x45, (byte) 0x87, (byte) 0x47, (byte) 0x46, (byte) 0x86,
(byte) 0x82, (byte) 0x42, (byte) 0x43, (byte) 0x83, (byte) 0x41,
(byte) 0x81, (byte) 0x80, (byte) 0x40 };
public int value;
public CRC16() {
value = 0;
}
public void update(byte[] puchMsg, int usDataLen) {
int uIndex;
// int i = 0;
for (int i = 0; i < usDataLen; i++) {
uIndex = (uchCRCHi ^ puchMsg[i]) & 0xff;
uchCRCHi = (byte) (uchCRCLo ^ auchCRCHi[uIndex]);
uchCRCLo = auchCRCLo[uIndex];
}
value = ((((int) uchCRCHi) << 8 | (((int) uchCRCLo) & 0xff))) & 0xffff;
return;
}
public void reset() {
value = 0;
uchCRCHi = (byte) 0xff;
uchCRCLo = (byte) 0xff;
}
public int getValue() {
return value;
}
private static byte uniteBytes(byte src0, byte src1) {
byte _b0 = Byte.decode(“0x” + new String(new byte[] { src0 }))
.byteValue();
_b0 = (byte) (_b0 << 4);
byte _b1 = Byte.decode(“0x” + new String(new byte[] { src1 }))
.byteValue();
byte ret = (byte) (_b0 ^ _b1);
return ret;
}
private static byte[] HexString2Buf(String src) {
int len = src.length();
byte[] ret = new byte[len / 2+2];
byte[] tmp = src.getBytes();
for (int i = 0; i < len; i += 2) {
ret[i / 2] = uniteBytes(tmp[i], tmp[i + 1]);
}
return ret;
}
public static byte[] getSendBuf(String toSend){
byte[] bb = HexString2Buf(toSend);
CRC16 crc16 = new CRC16();
crc16.update(bb, bb.length-2);
int ri = crc16.getValue();
bb[bb.length-1]=(byte) (0xff & ri);
bb[bb.length-2]=(byte) ((0xff00 & ri) >> 8);
return bb;
}
public static boolean checkBuf(byte[] bb){
CRC16 crc16 = new CRC16();
crc16.update(bb, bb.length-2);
int ri = crc16.getValue();
if(bb[bb.length-1]==(byte)(ri&0xff)
&& bb[bb.length-2]==(byte) ((0xff00 & ri) >> 8))
return true;
return false;
}
public static String getBufHexStr(byte[] raw){
if ( raw == null ) {

  return null;

}

final StringBuilder hex = new StringBuilder( 2 * raw.length );

for ( final byte b : raw ) {

  hex.append(HEXES.charAt((b & 0xF0) >> 4))

    .append(HEXES.charAt((b & 0x0F)));

}

return hex.toString().toLowerCase();}
/****
• 得到CRC验证
• @param tt
• @return
*/
public static String getCrc(String tem){
// String tem="";
// for(int i=0;i<tt.length;i++){
// tem+=tt[i];
// System.out.println(“这是传入的值”+tt[i]);
// }
byte[] sbuf = CRC16.getSendBuf(tem);
System.out.println(“这是得到的crc”+CRC16.getBufHexStr(sbuf));
return CRC16.getBufHexStr(sbuf).substring(12, 16).toLowerCase();
}
/**得到要发送的数据
• @param args
*/
public static String getSendData(String [] tt) {
String tem="";
for(int i=0;i<tt.length;i++){
tem+=tt[i];
}
byte[] sbuf = CRC16.getSendBuf(tem);
return CRC16.getBufHexStr(sbuf);
}
public static byte[] getSendBuf2(String [] tt){
String tem="";
for(int i=0;i<tt.length;i++){
tem+=tt[i];
}
byte[] bb = HexString2Buf(tem);
CRC16 crc16 = new CRC16();
crc16.update(bb, bb.length-2);
int ri = crc16.getValue();
bb[bb.length-1]=(byte) (0xff & ri);
bb[bb.length-2]=(byte) ((0xff00 & ri) >> 8);
return bb;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
//0103040a3d3fb739a1----sendB
//010304b8523ffeef32----sendB
byte[] sbuf = CRC16.getSendBuf(“0103040a3d3fb7”);
System.out.println(CRC16.getBufHexStr(sbuf));
}
}
Test代码如下：
package oldTest;
import java.io.Flushable;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Random;
import javax.comm.CommPortIdentifier;
import javax.comm.SerialPort;
public class Test {
static Enumeration portList;
static CommPortIdentifier portId;
static SerialPort serialPort;
static OutputStream outputStream;
static InputStream inputStream;
static String nodeIdx="";
static String crc="";
public static StringBuffer open()throws Exception {
CommPortIdentifier commportidentifier = CommPortIdentifier
.getPortIdentifier(“COM1”);
serialPort = (SerialPort) commportidentifier.open(“scy app”, 80);
outputStream = serialPort.getOutputStream();
inputStream = serialPort.getInputStream();
InputStream input = serialPort.getInputStream();
while (true) {
StringBuffer content = new StringBuffer();
int i = 0;
String tag = “”;
String crcCode1 = “”;
String[] inputString = new String[6];
String crcCode2 = “”;
String tempString = “”;
serialPort.setInputBufferSize(8);
while (i < 8) {
if (i < 6) {
tempString = Integer.toHexString(input.read());
if (tempString.length() < 2) {
tempString = “0” + tempString;
}
inputString[i] = tempString;
// inputString[0];得到站点名称
nodeIdx = inputString[0];
// inputString[2] + inputString[3];得到检测指标
tag = inputString[2] + inputString[3];
content.append(tempString);
System.out.println("==这是数据段"+content);
} else {
if (i == 6) {// 得到Crc值的前两位
crcCode1 = Integer.toHexString(input.read());
if (crcCode1.length() < 2) {
crcCode1 = “0” + crcCode1;
}
}
if (i == 7) {// 得到Crc值的后两位
crcCode2 = Integer.toHexString(input.read());
if (crcCode2.length() < 2) {
crcCode2 = “0” + crcCode2;
}
}
crc=crcCode1+crcCode2;
System.out.println("==这是crc"+crc);
}
i++;
}
if (CRC16.getCrc(content.toString()).equals(crc)) {
// System.out.println(crcCode1 + crcCode2 + “得到的数据段正确”
// + CRC16.getCrc(inputString));
String nodeName = “”;
if (nodeIdx.equals(“01”)) {
nodeName = “监测站点1”;
checkNode(tag, nodeName);
} else {
System.out.println(“这也许是监测站点2的站点”);
nodeName = “监测站点2”;
checkNode(tag, nodeName);
}
} else {
System.out.println(crc + “得到的数据段不正确”
• CRC16.getCrc(content.toString()));
}
}
}
public static void main(String[] args) {
try {
open();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void checkNode(String tag, String nodeName) {
if (tag.equals(“012c”)) {
// System.out.println(“这是说明要查悬浮物”);
sendData(nodeName, “悬浮物”);
} else if (tag.equals(“0064”)) {
// System.out.println(“这是说明要查PH值”);
sendData(nodeName, “PH值”);
} else if (tag.equals(“0b54”)) {
// System.out.println(“这是说明要查氨氮”);
sendData(nodeName, “氨氮”);
} else if (tag.equals(“0d48”)) {
sendData(nodeName, “污水总量”);
} else if (tag.equals(“0000”)) {
sendData(nodeName, “污水总量”);
} else if (tag.equals(“01f4”)) {
sendData(nodeName, “COD”);
} else {
// System.out.println(tag + “这个tag不知道是啥”);
}
}
public static int getRandom(int min, int max) {
Random random = new Random();
int s = random.nextInt(max) % (max - min + 1) + min;
return s;
}
public static int getRandomEnd() {
int max = 99;
int min = 01;
Random random = new Random();
int s = random.nextInt(max) % (max - min + 1) + min;
return s;
}
public static float getFloatNum(int min, int max) {
return Float.valueOf(getRandom(min, max) + “.” + getRandomEnd());
}
public static void sendData(String nodeName, String tagName) {
DB db = new DB();
try {
Float ff = 0f;
// ff = db.onSelect(nodeName, tagName);
ff=getFloatNum(1,99);
java.text.NumberFormat formater = java.text.DecimalFormat
.getInstance();
String[] totalTemp = new String[7];
if (nodeName.equals(“检测站点1”)) {
totalTemp[0] = “01”;
// if(tagName.equals(“COD”)){
// ff=15f;
// }else{
// ff=11f;
// }
} else {
totalTemp[0] = “02”;
}
formater.setMaximumFractionDigits(2);
formater.setMinimumFractionDigits(2);
ff = Float.valueOf(formater.format(ff));
System.out.println(“查询完毕,” + tagName + “值为:” + ff);
int fi = Float.floatToRawIntBits(ff);
String num = Integer.toHexString(fi).toString();
if (!num.equals(“0”)) {
totalTemp[1] = “03”;
totalTemp[2] = “04”;
totalTemp[4] = num.substring(6, 8);
totalTemp[3] = num.substring(4, 6);
totalTemp[6] = num.substring(2, 4);
totalTemp[5] = num.substring(0, 2);
} else {
totalTemp[1] = “03”;
totalTemp[2] = “04”;
totalTemp[4] = “00”;
totalTemp[3] = “00”;
totalTemp[6] = “00”;
totalTemp[5] = “00”;
}
byte[] sendB = CRC16.getSendBuf2(totalTemp);
outputStream.write(sendB);
outputStream.flush();
outputStream.close();
System.out.println(“发送完毕”);
} catch (Exception e) {
e.printStackTrace();
} finally {
db.close();
}
}
}
DB类如下：
package oldTest;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Calendar;
import java.util.Random;
public class DB {
private Connection con;
private Statement sta;
private ResultSet res;
private String driverName = “com.microsoft.jdbc.sqlserver.SQLServerDriver”; // 加载JDBC驱动
private String dbURL = “jdbc:sqlserver://localhost:1433; DatabaseName=MonitoringSystem”; // 连接服务器和数据库sample
private String userName = “sa”; // 默认用户名
private String userPwd = “”; // 密码
public DB() {
try {
Class.forName(driverName);
con = DriverManager.getConnection(dbURL, userName, userPwd);
// System.out.println(“Connection Successful!”); // 如果连接成功
// 控制台输出Connection
// Successful!
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static int getRandom(int min, int max) {
Random random = new Random();
int s = random.nextInt(max) % (max - min + 1) + min;
return s;
}
public static int getRandomEnd() {
int max = 99;
int min = 01;
Random random = new Random();
int s = random.nextInt(max) % (max - min + 1) + min;
return s;
}
public static float getFloatNum(int min, int max) {
return Float.valueOf(getRandom(min, max) + “.” + getRandomEnd());
}
public static float getCFZ() {
return getFloatNum(40, 48);
}
public static float getCY() {
return getFloatNum(100, 110);
}
/***************************************************************************
• 得到N条记录
• 
• @param tagName
• @return
*/
public Float onSelect(String nodeName, String tagName) {
Float ff = 0f;
String sql = “select * from DQYT_MacamCore.dbo.tpoints where name=’”
• tagName + “’ and fullname like '%” + nodeName + “%’”;
try {
sta = con.createStatement();
res = sta.executeQuery(sql);
while (res.next()) {
int tagid = res.getInt(“tagId”);
String name = res.getString(“Name”);
String sql2 = “select top 1 * from DQYT_MacamHisData.dbo.”
• getTBName() + " where tagid=" + tagid
• " order by idx desc ";
// System.out.println(sql2);
ResultSet rs2;
Statement sta2 = null;
sta2 = con.createStatement();
rs2 = sta2.executeQuery(sql2);
if (tagName.equals(“污水总量”)) {
String sql3 = “insert into MonitoringSystem.dbo.UploadInfo values(”
• tagid
• “,’”
• name
• “’,”
• ff
• “,’”
• getEndTime() + “’)”;
System.out.println(sql3);
Statement sta3 = null;
sta3 = con.createStatement();
sta3.executeUpdate(sql3);
return ff;
} else {
if (name.equals(tagName)) {
while (rs2.next()) {
if (nodeName.equals(“监测站点1”)) {
if (rs2.getFloat(4) >= 50) {
ff = getCFZ();
} else {
ff = rs2.getFloat(4);
}
} else if (nodeName.equals(“监测站点2”)) {
if (rs2.getFloat(4) >= 120) {
ff = getCY();
} else {
ff = rs2.getFloat(4);
}
}
String sql3 = “insert into MonitoringSystem.dbo.UploadInfo values(”
• tagid
• “,’”
• name
• “’,”
• ff
• “,’”
• getEndTime() + “’)”;
System.out.println(sql3);
Statement sta3 = null;
sta3 = con.createStatement();
sta3.executeUpdate(sql3);
return ff;
}
}
}
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return 0f;
}
/***************************************************************************
• 根据站点名称，得到其污水总量
• 
• @param tagName
• @return
*/
public Float getTagAndTypeLayerId(String nodeName, String tagName) {
String sql = “select * from DQYT_MacamCore.dbo.tpoints where name=’”
• tagName + “’ and fullname like '%” + nodeName + “%’”;
try {
sta = con.createStatement();
res = sta.executeQuery(sql);
// System.out.println(sql);
while (res.next()) {
int tagid = res.getInt(“tagId”);
String name = res.getString(“Name”);
String errorAmount = getErrorAmount(res.getInt(“nodeIdx”));
Long tSewage = getTSewage(tagid);
ResultSet rs2;
Statement sta2 = null;
sta2 = con.createStatement();
sql = “insert into MonitoringSystem.dbo.UploadInfo values(”
• tagid
• “,’”
• name
• “’,”
• Float
.valueOf((Long.parseLong(errorAmount) + tSewage))
• “,’” + getEndTime() + “’)”;
sta2.executeUpdate(sql);
return Float.valueOf((Long.parseLong(errorAmount) + tSewage));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
/***************************************************************************
• 得到污水总量
• 
• @param tagId
• @return
*/
public Long getTSewage(int tagId) {
try {
String sql = “select sum(tSewage) from MonitoringSystem.dbo.TotalSewage where tagId=”
• tagId;
sta = con.createStatement();
res = sta.executeQuery(sql);
if (res.next()) {
Long tSewage = res.getLong(1);
return tSewage;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return new Long(0);
}
/***************************************************************************
• 得到该站点的误差值
• 
• @param typeLayerIdx
• @return
*/
public String getErrorAmount(int typeLayerIdx) {
try {
String sql = “select * from MonitoringSystem.dbo.SiteMessage where typeLayerIdx=”
• typeLayerIdx;
sta = con.createStatement();
res = sta.executeQuery(sql);
while (res.next()) {
String errorAmount = res.getString(“errorAmount”);
return errorAmount;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception ee) {
ee.printStackTrace();
}
return “0”;
}
public void close() {
try {
if (sta != null) {
sta.close();
}
if (con != null) {
con.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String getTBName() {
java.util.Date d = new java.util.Date();
java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat();
sdf.applyPattern(“yyyyMMdd”);
String table = “THisData” + sdf.format(d);
table = “THisData20091218”;
return table;
}
public String getStartTime() {
java.util.Date d = new java.util.Date();
Calendar cal1 = Calendar.getInstance();
// cal1.set(2010, 04, 21);
d.setMinutes(d.getMinutes() - 1);
java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat();
sdf.applyPattern(“yyyy-MM-dd HH:mm”);
String ttime = sdf.format(d.getTime());
return ttime;
}
public static String getEndTime() {
java.util.Date d = new java.util.Date();
Calendar cal1 = Calendar.getInstance();
// cal1.set(2010, 04, 21);
java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat();
sdf.applyPattern(“yyyy-MM-dd HH:mm”);
String ttime = sdf.format(d.getTime());
return ttime;
}
public static void main(String[] args) {
DB db = new DB();
db.onSelect(“监测站点1”, “COD”);
}
}