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| package com.rain.demo;
import java.io.UnsupportedEncodingException;
public class UTF8{
/**
* Utf8URL编码
* @param s
* @return
*/
public static final String Utf8URLencode(String text) {
StringBuffer result = new StringBuffer();
for (int i = 0; i < text.length(); i++) {
char c = text.charAt(i);
if (c >= 0 && c <= 255) {
result.append(c);
}else {
byte[] b = new byte[0];
try {
b = Character.toString(c).getBytes("UTF-8");
}catch (Exception ex) {
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0) k += 256;
result.append("%" + Integer.toHexString(k).toUpperCase());
}
}
}
return result.toString();
}
/**
* Utf8URL解码
* @param text
* @return
*/
public static final String Utf8URLdecode(String text) {
String result = "";
int p = 0;
if (text!=null && text.length()>0){
text = text.toLowerCase();
p = text.indexOf("%e");
if (p == -1) return text;
while (p != -1) {
result += text.substring(0, p);
text = text.substring(p, text.length());
if (text == "" text.length() < 9) return result;
result += CodeToWord(text.substring(0, 9));
text = text.substring(9, text.length());
p = text.indexOf("%e");
}
}
return result + text;
}
/**
* utf8URL编码转字符
* @param text
* @return
*/
private static final String CodeToWord(String text) {
String result;
if (Utf8codeCheck(text)) {
byte[] code = new byte[3];
code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);
code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);
code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);
try {
result = new String(code, "UTF-8");
}catch (UnsupportedEncodingException ex) {
result = null;
}
}
else {
result = text;
}
return result;
}
/**
* 编码是否有效
* @param text
* @return
*/
private static final boolean Utf8codeCheck(String text){
String sign = "";
if (text.startsWith("%e"))
for (int i = 0, p = 0; p != -1; i++) {
p = text.indexOf("%", p);
if (p != -1)
p++;
sign += p;
}
return sign.equals("147-1");
}
/**
* 判断是否Utf8Url编码
* @param text
* @return
*/
public static final boolean isUtf8Url(String text) {
text = text.toLowerCase();
int p = text.indexOf("%");
if (p != -1 && text.length() - p > 9) {
text = text.substring(p, p + 9);
}
return Utf8codeCheck(text);
}
/**
* 测试
* @param args
*/
public static void main(String[] args) {
String url;
url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";
if(CharTools.isUtf8Url(url)){
System.out.println(CharTools.Utf8URLdecode(url));
}
url = "http://www.google.com/search?hl=zh-cn&newwindow=1&q=中国大百科在线全文检索&btng=搜索&lr=";
if(!CharTools.isUtf8Url(url)){
System.out.println(CharTools.Utf8URLencode(url));
}
}
}
|
