URL传递中文参数中乱码问题的解决方案

    乱码问题对每个程序员来说，都是曾经的一个伤疤。尤其是做J2EE的新手，这问题总在我们周围晃悠。起初是表单提交到action中乱码（最后到数据库当然是乱码），表面上看可能是数据库编码设置问题，但当我们正确设置数据库编码后仍然发现最后还是乱码，接着又认为是页面编码设置不统一而导致提交表单后出现乱码，这个火星人都知道，结果问题依然存在。这时我们又想到可能是提交时post到服务器导致的乱码，也正确，于是我们想到了将字符串转码。问题也能解决，但不能说每次提交我们都要将字符串转码吧，如果是这样，可能谁都不想干coding这行了，光花在这上面的时间，就虚度了大半光阴。后来，我们知道有了过滤流这玩意，所有乱码问题顿时成为往事。加个过滤器搞定一切乱码，从此我们不再烦恼。顿时想起“奇强”牌某某粉，过滤流==奇强。

     正当我们以为不会再被乱码头疼的时候。ajax技术兴起了，那个爽啊，玩的不亦乐乎。ajax中经常用到url来传递参数，中文参数的更是用的日趋广泛。搞个ajax检索，需要吧，用了google的搜索她们都说好，我们能不用吗，怎么说也不能落后于潮流吧。新技术来了，老毛病也来了。在GBK GB2312编码的页面中使用ajax， 用url传递参数，结果提交的都是乱码。难道过滤流毛病了?这个不想做过多评论．问题总要想办法解决，网络中惊呼＂url中传递参数乱码如何解决啊？＂，＂url中传递参数避免乱码的方案＂。我只想说一句，＂问题总能解决＂。

　废话够了，转如正题．

　比如ajax请求的url="searchPeoBySomeWords.do?KeyWord="+obj.value;我们需要用escape函数来将中文参数“包装”两下，看清楚是两下，不是一下。url="searchPeoBySomeWords.do?KeyWord="+escape(escape(obj.value))。那么这样“包装”后我们如何在action中来解码了，不要急，一个java方法就能解决问题(代码如Escape.java)。action中我们只要用Escape.java中的unescape静态方法就可解码。String keyWord = Escape.unescape(request.getParameter("KeyWord")).trim();原来拆开"包装"后，依然是我们可爱的中文。

java 代码

package com.ctgusec.oaPlus;
/**
 * 将url中文参数编码或者反编码
 * 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)]);
            }
        }
        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)));
//    }
}

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Ajax中的get和post两种请求方式的用法 | 关于持久化

• 2007-12-12 18:20
• 浏览 5942
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评论

6 楼 happy002 2008-08-15  

encodeURI(encodeURI(...))

5 楼 cherish_w 2008-08-14  

对中文参数用encodeUriComponent方法即可解决这个问题

4 楼 Relucent 2008-07-07  

为什么不用 (char)Integer.parseInt(XXXX)

3 楼 spxrttn 2008-07-05  

这个方法是在是太笨了

2 楼 wufei1310 2008-05-29  

非常
感谢！！

1 楼 xinhongjian 2008-05-20