package com.ld.igds.protocol.utl;
|
|
|
import java.text.ParseException;
|
|
/**
|
* GPS工具类
|
*/
|
public class GpsUtils {
|
|
/**
|
* 标识位
|
*/
|
public static final String MSG = "7E";
|
/**
|
* 注册消息ID
|
*/
|
public static final String MSG_01 = "0100";
|
/**
|
* 注册应答消息ID
|
*/
|
public static final String MSG_11 = "8100";
|
/**
|
* 鉴权消息ID
|
*/
|
public static final String MSG_02 = "0102";
|
/**
|
* 鉴权应答消息ID
|
*/
|
public static final String MSG_22 = "8001";
|
/**
|
* 位置信息主动汇报消息ID
|
*/
|
public static final String MSG_333 = "0200";
|
/**
|
* 位置信息查询应答消息ID
|
*/
|
public static final String MSG_03 = "0201";
|
/**
|
* 位置信息查询消息ID
|
*/
|
public static final String MSG_33 = "8201";
|
|
/**
|
* 添加标识符
|
* @param msg
|
* @return
|
*/
|
public static String addIdentifier(String msg){
|
return MSG+msg+MSG;
|
}
|
|
/**
|
* 去除标识符
|
* @param msg
|
* @return
|
*/
|
public static String delIdentifier(String msg){
|
return msg.replaceAll(MSG,"");
|
}
|
|
/**
|
* 转义：0x7D-->0x7D0x01,0x7E-->0x7D0x02
|
* @param msg
|
* @return
|
*/
|
public static String escapeCode1(String msg){
|
String str = "";
|
for(int i=0;i<=msg.length()-2;i=i+2){
|
str += "0x" + msg.substring(i,i+2);
|
}
|
String s = str.replaceAll("0x7D", "0x7D0x01");
|
return s.replaceAll("0x7E", "0x7D0x02").replaceAll("0x", "");
|
}
|
|
/**
|
* 转义：0x7D0x02-->0x7E,0x7D0x01-->0x7D
|
* @param msg
|
* @return
|
*/
|
public static String escapeCode2(String msg){
|
String str = "";
|
for(int i=0;i<=msg.length()-2;i=i+2){
|
str += "0x" + msg.substring(i,i+2);
|
}
|
String s = str.replaceAll("0x7D0x02", "0x7E");
|
return s.replaceAll("0x7D0x01", "0x7D").replaceAll("0x", "");
|
}
|
|
public static void main(String[] args) throws ParseException {
|
String msg = "01 02 00 06 01 38 20 03 63 16 00 01 01 38 20 03 63 16";
|
String checkCode = checkCode(msg.replaceAll(" ",""));
|
System.out.println(checkCode);
|
}
|
|
/**
|
* BCC校验(异或校验)
|
* @param content
|
* @return
|
*/
|
public static String checkCode(String content) {
|
String con = change(content);
|
String[] b = con.split(" ");
|
int a = 0;
|
for (int i = 0; i < b.length; i++) {
|
a = a ^ Integer.parseInt(b[i], 16);
|
}
|
if(a<10){
|
StringBuffer sb = new StringBuffer();
|
sb.append("0");
|
sb.append(a);
|
return sb.toString();
|
}
|
return Integer.toHexString(a);
|
}
|
private static String change(String content) {
|
String str = "";
|
for (int i = 0; i < content.length(); i++) {
|
if (i % 2 == 0) {
|
str += " " + content.substring(i, i + 1);
|
} else {
|
str += content.substring(i, i + 1);
|
}
|
}
|
return str.trim();
|
}
|
}
|
