Posted on 2009-10-14 14:04
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java

public class EscapeUnescape
{


public static String escape(String src)
{
int i;
char j;
StringBuffer tmp = new StringBuffer();
tmp.ensureCapacity(src.length() * 6);

for (i = 0; i < src.length(); i++)
{
j = src.charAt(i);
if (Character.isDigit(j) || Character.isLowerCase(j)
|| Character.isUpperCase(j))
tmp.append(j);

else if (j < 256)
{
tmp.append("%");
if (j < 16)
tmp.append("0");
tmp.append(Integer.toString(j, 16));

} else
{
tmp.append("%u");
tmp.append(Integer.toString(j, 16));
}
}
return tmp.toString();
}


public static String unescape(String src)
{
StringBuffer tmp = new StringBuffer();
tmp.ensureCapacity(src.length());
int lastPos = 0, pos = 0;
char ch;

while (lastPos < src.length())
{
pos = src.indexOf("%", lastPos);

if (pos == lastPos)
{

if (src.charAt(pos + 1) == 'u')
{
ch = (char) Integer.parseInt(src
.substring(pos + 2, pos + 6), 16);
tmp.append(ch);
lastPos = pos + 6;

} else
{
ch = (char) Integer.parseInt(src
.substring(pos + 1, pos + 3), 16);
tmp.append(ch);
lastPos = pos + 3;
}

} else
{

if (pos == -1)
{
tmp.append(src.substring(lastPos));
lastPos = src.length();

} else
{
tmp.append(src.substring(lastPos, pos));
lastPos = pos;
}
}
}
return tmp.toString();
}


public static void main(String[] args)
{
String tmp = "中文";
System.out.println("testing escape : " + tmp);
tmp = escape(tmp);
System.out.println(tmp);
System.out.println("testing unescape :" + tmp);
System.out.println(unescape("%u6211%u4eec"));
}
}

以上为一个工具类,为解决中文乱码
html前台:escape(escape('你好'))
后台:String txt=EscapeUnescape.unescape(aStringText);
escape本身参数编码为ISO8859-1,escape中文传替给servlet会直接为null接收不到,经过以上特殊处理即可解决!其他方法也可,如:手动转码...