//字符串去重
public String distinctStringWithDot(String str) {
String[]array=str.split(",");
List<String> list = new ArrayList<String>();
for(int i=0;i<array.length;i++){
for(int j=i+1;j<array.length;j++){
if(array[i].equals(array[j])){
j = ++i;
}
}
list.add(array[i]);
}
String newStr="";
for(String s:list){
newStr=newStr+s+",";
}
return newStr;
}