地址栏传递中文参数乱码在js里用escape转码

乱码，乱码，头大，烦，话说设置Tomcat后可以解决，但有的时候不管用了，这时，我们可以考虑转码方式不直接传中文，在js里用escape转码，记得需要用两次，如：

var str=escape("这是中文参数");

str=escape(str);

xxx.do?name=str;

在后台通过一个类的方法再转回来：

Escape.unescape(request.getParameter("name"));

Escape类如下：

package com.laneasy.hy.util; 

/** 
* js编转码java实现类. 
* 
* @author yangjinde 
*/ 
public class Escape { 

/** The Constant hex. */ 
private final static String[] hex = { "00", "01", "02", "03", "04", "05", 
"06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F", "10", 
"11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B", 
"1C", "1D", "1E", "1F", "20", "21", "22", "23", "24", "25", "26", 
"27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F", "30", "31", 
"32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", 
"3D", "3E", "3F", "40", "41", "42", "43", "44", "45", "46", "47", 
"48", "49", "4A", "4B", "4C", "4D", "4E", "4F", "50", "51", "52", 
"53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", 
"5E", "5F", "60", "61", "62", "63", "64", "65", "66", "67", "68", 
"69", "6A", "6B", "6C", "6D", "6E", "6F", "70", "71", "72", "73", 
"74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E", 
"7F", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", 
"8A", "8B", "8C", "8D", "8E", "8F", "90", "91", "92", "93", "94", 
"95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F", 
"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA", 
"AB", "AC", "AD", "AE", "AF", "B0", "B1", "B2", "B3", "B4", "B5", 
"B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF", "C0", 
"C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB", 
"CC", "CD", "CE", "CF", "D0", "D1", "D2", "D3", "D4", "D5", "D6", 
"D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF", "E0", "E1", 
"E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC", 
"ED", "EE", "EF", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", 
"F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF" }; 

/** The Constant val. */ 
private final static byte[] val = { 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x00, 0x01, 
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F }; 

/** 
* Escape. 
* 
* @param s 
* the s 
* 
* @return the string 
*/ 
/** 
* 编码 
* 
* @param s 
* @return 
*/ 
public static String escape(String s) { 
if (s != null) { 
StringBuffer sbuf = new StringBuffer(); 
int len = s.length(); 
for (int i = 0; i < len; i++) { 
int ch = s.charAt(i); 
if ('A' <= ch && ch <= 'Z') { 
sbuf.append((char) ch); 
} else if ('a' <= ch && ch <= 'z') { 
sbuf.append((char) ch); 
} else if ('0' <= ch && ch <= '9') { 
sbuf.append((char) ch); 
} else if (ch == '-' || ch == '_' || ch == '.' || ch == '!' 
|| ch == '~' || ch == '*' || ch == '\'' || ch == '(' 
|| ch == ')') { 
sbuf.append((char) ch); 
} else if (ch <= 0x007F) { 
sbuf.append('%'); 
sbuf.append(hex[ch]); 
} else { 
sbuf.append('%'); 
sbuf.append('u'); 
sbuf.append(hex[(ch >>> 8)]); 
sbuf.append(hex[(0x00FF & ch)]); 
} 
} 
return sbuf.toString(); 
} 
return null; 
} 

/** 
* Unescape. 
* 
* @param s 
* the s 
* 
* @return the string 
*/ 
/** 
* 解码 说明：本方法保证 不论参数s是否经过escape()编码，均能得到正确的“解码”结果 
* 
* @param s 
* @return 
*/ 
public static String unescape(String s) { 
if (s != null) { 
StringBuffer sbuf = new StringBuffer(); 
int i = 0; 
int len = s.length(); 
while (i < len) { 
int ch = s.charAt(i); 
if ('A' <= ch && ch <= 'Z') { 
sbuf.append((char) ch); 
} else if ('a' <= ch && ch <= 'z') { 
sbuf.append((char) ch); 
} else if ('0' <= ch && ch <= '9') { 
sbuf.append((char) ch); 
} else if (ch == '-' || ch == '_' || ch == '.' || ch == '!' 
|| ch == '~' || ch == '*' || ch == '\'' || ch == '(' 
|| ch == ')') { 
sbuf.append((char) ch); 
} else if (ch == '%') { 
int cint = 0; 
if ('u' != s.charAt(i + 1)) { 
cint = (cint << 4) | val[s.charAt(i + 1)]; 
cint = (cint << 4) | val[s.charAt(i + 2)]; 
i += 2; 
} else { 
cint = (cint << 4) | val[s.charAt(i + 2)]; 
cint = (cint << 4) | val[s.charAt(i + 3)]; 
cint = (cint << 4) | val[s.charAt(i + 4)]; 
cint = (cint << 4) | val[s.charAt(i + 5)]; 
i += 5; 
} 
sbuf.append((char) cint); 
} else { 
sbuf.append((char) ch); 
} 
i++; 
} 
return sbuf.toString(); 
} 
return null; 
} 

}