fastjson 解析json

public String Chang(String key){
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(".\\src\\pro.js"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
StringBuilder sb=new StringBuilder();
String line=null;
try {
while((line=reader.readLine())!=null){
//把换行符去掉
sb.append(line);
}
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String str = sb.toString();
String newStr = str.substring(1,str.length()-1);
Map map = FastJsonUtil.stringToCollect(newStr);
String value = (String) map.get(""+key+"");
return value;
}