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解决ajax提交中文、URL中文参数传递后的乱码问题的解决办法

解决ajax提交中文、URL中文参数传递后的乱码问题的解决办法

在开发中,经常遇到用ajax提交数据,或者我们用url传递参数,如果是中文,我们就会遇到非常头疼的乱码问题。(Java乐园

比如: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。

或者我们在url后面传递参数,比如: http://locathost:8080/test/chinese.jsp?name=中文, 这个时候,我们在服务器段得到的数据就会乱码

那么我们怎么解决这个问题呢?
不要紧张,办法是有的,方法如下:

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

JAVA代码如下:
package test;

/**
* 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(Escape.unescape(escape(stest)));
        String s = "你好";
        String s1="%u4F60%u597D";
        System.out.println(escape(s));
        System.out.println(Escape.unescape(s1));
       
    }
}


######### 执行后答案:
中文1234 abcd[]()<+>,.~"
%u4E2D%u65871234+abcd%5B%5D()%3C%2B%3E%2C.~%5C
中文1234 abcd[]()<+>,.~"
%u4F60%u597D
你好



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。

posted on 2009-07-16 16:47 找个美女做老婆 阅读(4124) 评论(0)  编辑  收藏


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