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ajax交付中文后乱码解码类(.java)

发布时间： 2012-11-12 12:31:57 作者： rapoo

ajax提交中文后乱码解码类(.java)

解决ajax 提交中文后的乱码问题：

?

当我门用下边的对象及方法(ajax)??????????xh???=???new???ActiveXObject("Microsoft.XMLHTTP")???????????????xh.onreadystatechange???=???getReady???????????????xh.open("POST","/test/zhongwen.jsp",false)??向服务器端传送中文数据时,zhongwen.jsp得到parameter的值就会是乱码。那么我们怎么解决这个问题呢？首先在页面用js的escape方法去转码其次server端获取转码后的数据后，就用下边这个类Escape的unescape方法解码类Escape**?*?JavaScript?escape/unescape?编码的?Java?实现?*?author?jackyz?*?keep?this?copyright?info?while?using?this?method?by?free?*/public?class?Escape?{????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"????};????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????};????public?static?String?escape(String?s)?{????????StringBuffer?sbuf?=?new?StringBuffer();????????int?len?=?s.length();????????for?(int?i?=?0;?i?<?len;?i++)?{????????????int?ch?=?s.charAt(i);????????????if?(ch?==?'?')?{????????????????????????//?space?:?map?to?'+'?????????????????sbuf.append('+');????????????}?else?if?('A'?<=?ch?&&?ch?<=?'Z')?{????//?'A'..'Z'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?('a'?<=?ch?&&?ch?<=?'z')?{????//?'a'..'z'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?('0'?<=?ch?&&?ch?<=?'9')?{????//?'0'..'9'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?(ch?==?'-'?||?ch?==?'_'???????//?unreserved?:?as?it?was????????????????||?ch?==?'.'?||?ch?==?'!'????????????????||?ch?==?'~'?||?ch?==?'*'????????????????||?ch?==?'\''?||?ch?==?'('????????????????||?ch?==?')')?{????????????????sbuf.append((char)ch);????????????}?else?if?(ch?<=?0x007F)?{??????????????//?other?ASCII?:?map?to?%XX????????????????sbuf.append('%');????????????????sbuf.append(hex[ch]);????????????}?else?{????????????????????????????????//?unicode?:?map?to?%uXXXX????????????????sbuf.append('%');????????????????sbuf.append('u');????????????????sbuf.append(hex[(ch?>>>?8)]);????????????????sbuf.append(hex[(0x00FF?&?ch)]);????????????}????&nb
sp;???}????????return?sbuf.toString();????}????public?static?String?unescape(String?s)?{????????StringBuffer?sbuf?=?new?StringBuffer();????????int?i?=?0;????????int?len?=?s.length();????????while?(i?<?len)?{????????????int?ch?=?s.charAt(i);????????????if?(ch?==?'+')?{????????????????????????//?+?:?map?to?'?'?????????????????sbuf.append('?');????????????}?else?if?('A'?<=?ch?&&?ch?<=?'Z')?{????//?'A'..'Z'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?('a'?<=?ch?&&?ch?<=?'z')?{????//?'a'..'z'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?('0'?<=?ch?&&?ch?<=?'9')?{????//?'0'..'9'?:?as?it?was????????????????sbuf.append((char)ch);????????????}?else?if?(ch?==?'-'?||?ch?==?'_'???????//?unreserved?:?as?it?was????????????????||?ch?==?'.'?||?ch?==?'!'????????????????||?ch?==?'~'?||?ch?==?'*'????????????????||?ch?==?'\''?||?ch?==?'('????????????????||?ch?==?')')?{????????????????sbuf.append((char)ch);????????????}?else?if?(ch?==?'%')?{????????????????int?cint?=?0;????????????????if?('u'?!=?s.charAt(i+1))?{?????????//?%XX?:?map?to?ascii(XX)????????????????????cint?=?(cint?<<?4)?|?val[s.charAt(i+1)];????????????????????cint?=?(cint?<<?4)?|?val[s.charAt(i+2)];????????????????????i+=2;????????????????}?else?{????????????????????????????//?%uXXXX?:?map?to?unicode(XXXX)????????????????????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);????????????}????????????i++;????????}????????return?sbuf.toString();????}????public?static?void?main(String[]?args)?{????????String?stest?=?"中文1234?abcd[]()<+>,.~\\";????????System.out.println(stest);????????System.out.println(escape(stest));????????System.out.println(unescape(escape(stest)));????}}解码后就可以得到与页面提交的数据一致的数据了。我们来看看为什么要采取这种方法呢？Java?的?URLEncoder.encode?方法与?JavaScript?的?unescape?方法已经不能兼容了。现在浏览器的主流版本中?JavaScript?已经开始使用?Unicode?作为字符串的内码进行编码。即,?Unicode?字符?escape?之后的样子类似于?%uABCD?而?java?的?URLEncoder.encode?方法得到的结果是?%AB%CD?,转换出来的结果必定是乱码了。?在此应该感谢写Escape类的哥们，希望此帖对大家使用ajax有所帮助。?????????(责任编辑：包春林)

?

当我门用下边的对象及方法(ajax)
??????????xh???=???new???ActiveXObject("Microsoft.XMLHTTP")?????
??????????xh.onreadystatechange???=???getReady?????
??????????xh.open("POST","/test/zhongwen.jsp",false)??
向服务器端传送中文数据时,zhongwen.jsp得到parameter的值就会是乱码。
那么我们怎么解决这个问题呢？

首先在页面用js的escape方法去转码
其次server端获取转码后的数据后，就用下边这个类Escape的unescape方法解码
类Escape
**
?*?JavaScript?escape/unescape?编码的?Java?实现
?*?author?jackyz
?*?keep?this?copyright?info?while?using?this?method?by?free
?*/
public?class?Escape?{
????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"
????};
????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
????};
????public?static?String?escape(String?s)?{
????????StringBuffer?sbuf?=?new?StringBuffer();
????????int?len?=?s.length();
????????for?(int?i?=?0;?i?<?len;?i++)?{
????????????int?ch?=?s.charAt(i);
????????????if?(ch?==?'?')?{????????????????????????//?space?:?map?to?'+'?
????????????????sbuf.append('+');
????????????}?else?if?('A'?<=?ch?&&?ch?<=?'Z')?{????//?'A'..'Z'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?('a'?<=?ch?&&?ch?<=?'z')?{????//?'a'..'z'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?('0'?<=?ch?&&?ch?<=?'9')?{????//?'0'..'9'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?(ch?==?'-'?||?ch?==?'_'???????//?unreserved?:?as?it?was
????????????????||?ch?==?'.'?||?ch?==?'!'
????????????????||?ch?==?'~'?||?ch?==?'*'
????????????????||?ch?==?'\''?||?ch?==?'('
????????????????||?ch?==?')')?{
????????????????sbuf.append((char)ch);
????????????}?else?if?(ch?<=?0x007F)?{??????????????//?other?ASCII?:?map?to?%XX
????????????????sbuf.append('%');
????????????????sbuf.append(hex[ch]);
????????????}?else?{????????????????????????????????//?unicode?:?map?to?%uXXXX
????????????????sbuf.append('%');
????????????????sbuf.append('u');
????????????????sbuf.append(hex[(ch?>>>?8)]);
????????????????sbuf.append(hex[(0x00FF?&?ch)]);
????????????}
????&nb

sp;???}
????????return?sbuf.toString();
????}
????public?static?String?unescape(String?s)?{
????????StringBuffer?sbuf?=?new?StringBuffer();
????????int?i?=?0;
????????int?len?=?s.length();
????????while?(i?<?len)?{
????????????int?ch?=?s.charAt(i);
????????????if?(ch?==?'+')?{????????????????????????//?+?:?map?to?'?'?
????????????????sbuf.append('?');
????????????}?else?if?('A'?<=?ch?&&?ch?<=?'Z')?{????//?'A'..'Z'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?('a'?<=?ch?&&?ch?<=?'z')?{????//?'a'..'z'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?('0'?<=?ch?&&?ch?<=?'9')?{????//?'0'..'9'?:?as?it?was
????????????????sbuf.append((char)ch);
????????????}?else?if?(ch?==?'-'?||?ch?==?'_'???????//?unreserved?:?as?it?was
????????????????||?ch?==?'.'?||?ch?==?'!'
????????????????||?ch?==?'~'?||?ch?==?'*'
????????????????||?ch?==?'\''?||?ch?==?'('
????????????????||?ch?==?')')?{
????????????????sbuf.append((char)ch);
????????????}?else?if?(ch?==?'%')?{
????????????????int?cint?=?0;
????????????????if?('u'?!=?s.charAt(i+1))?{?????????//?%XX?:?map?to?ascii(XX)
????????????????????cint?=?(cint?<<?4)?|?val[s.charAt(i+1)];
????????????????????cint?=?(cint?<<?4)?|?val[s.charAt(i+2)];
????????????????????i+=2;
????????????????}?else?{????????????????????????????//?%uXXXX?:?map?to?unicode(XXXX)
????????????????????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);
????????????}
????????????i++;
????????}
????????return?sbuf.toString();
????}
????public?static?void?main(String[]?args)?{
????????String?stest?=?"中文1234?abcd[]()<+>,.~\\";
????????System.out.println(stest);
????????System.out.println(escape(stest));
????????System.out.println(unescape(escape(stest)));
????}
}
解码后就可以得到与页面提交的数据一致的数据了。

我们来看看为什么要采取这种方法呢？
Java?的?URLEncoder.encode?方法与?JavaScript?的?unescape?方法已经不能兼容了。
现在浏览器的主流版本中?JavaScript?已经开始使用?Unicode?作为字符串的内码进行编码。即,?Unicode?字符?escape?之后的样子类似于?%uABCD?而?java?的?URLEncoder.encode?方法得到的结果是?%AB%CD?,转换出来的结果必定是乱码了。

1 楼 dearmite 2008-04-02 我一年前在开发中碰到这个问题
（因为当时不叫AJAX，）
当时我说JS，不能传汉字，
结果，那时候AJAX，正是炒的时候，

没人理。
但是现在，终于有人出面解决这个问题了。

太感谢了 2 楼 anonymity 2008-04-21 实际上在js中用urlcontentencode或urlencode也可以加码，但是在后台有些地方可以直接用getparmete（方法名记不住了）获得，但是有些地方还要decode一下，有些地方需要decode两次才能获得，不知道为什么。

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