StringUtil

package per.son.utils;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.json.JSONArray;

import org.json.JSONObject;

public class StringUtil {

/**

* 字符串转换JSONObject

* @param string

* @return

*/

public static JSONObject String2Json(String string){

if(string == null){

return null;

}

String jsonString = string.trim();

if(jsonString.startsWith("{") && jsonString.endsWith("}")){

JSONObject jb = null;

try {

jb = new JSONObject(jsonString);

return jb;

}catch (Exception e) {

return null;

}

}else if(jsonString.startsWith("[") && jsonString.endsWith("]")){

JSONArray ja = null;

try {

ja = new JSONArray(jsonString);

return (JSONObject)ja.get(0);

}catch(Exception e){

return null;

} 

}

return null;

}

/**

* 正则匹配出想要的字符串

* @param regex

* @param Content

* @param groupNum

* @return

*/

public static String getRegexStr(String regex, String Content,int groupNum){

Pattern compile = Pattern.compile(regex);

Matcher m = compile.matcher(Content);

while(m.find()){

String group = m.group(groupNum);

if(null != group){

return group;

} 

}

return null;

}

}