去掉字符串中的特殊字符

package cn.test;

public class ttjson {

/**
* @param args
*/
public static void main(String[] args) {
String s = "dq/d d  l\"l";
ttjson t = new ttjson();
System.out.println(t.string2Json(s));
}


public String string2Json(String s) {        
        StringBuffer sb = new StringBuffer();        
        for (int i=0; i<s.length(); i++) {  
            char c = s.charAt(i);    
             switch (c){  
             case '\"':        
                 sb.append("\\\"");        
                 break;        
             case '\\':        
                 sb.append("\\\\");        
                 break;        
             case '/':        
                 sb.append("\\/");        
                 break;        
             case '\b':        
                 sb.append("\\b");        
                 break;        
             case '\f':        
                 sb.append("\\f");        
                 break;        
             case '\n':        
                 sb.append("\\n");        
                 break;        
             case '\r':        
                 sb.append("\\r");        
                 break;        
             case '\t':        
                 sb.append("\\t");        
                 break;        
             default:        
                 sb.append(c);     
             }  
         }      
        return sb.toString();     
      }

}





package cn.test;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringUtils {
public static String replaceBlank(String str) {
String dest = "";
if (str!=null) {
Pattern p = Pattern.compile("\\s*|\t|\r|\n");
Matcher m = p.matcher(str);
dest = m.replaceAll("");
}
return dest;
}
public static void main(String[] args) {
System.out.println(StringUtils.replaceBlank("just do it!"));
}
/*-----------------------------------
*        笨方法：String s = "你要去除的字符串";
*                      1.去除空格：s = s.replace('\\s','');              
*                      2.去除回车：s = s.replace('\n','');      
*                      这样也可以把空格和回车去掉，其他也可以照这样做。      
*                      注：\n 回车(\u000a)     
*                      \t 水平制表符(\u0009)
*                          \s 空格(\u0008)     
*                          \r 换行(\u000d)*/
}







package cn.test;

public class testzz {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str ="我我....我...我.要...要要...要学....学学..学.编..编编.编.程.程.程..程"; //任意字符串
String str1 = str.replaceAll("(?s)(.)(?=.*\\1)", "").replace(".", ""); //去重复
System.out.println(str1);



}

}