RESTful服务

Question

I have to write a RESTful service with client but have some problems with functions because cant figure what Media Type they should @Produces.

Basically I have a few operations with strings: counting words, finding the index of a substring, counting symbols and reversing a string.

I have no problems with reversing the string, but with other three I am facing a problem because it seems that I can`t @Produce an int for some reason.

What type should I use so that I can @Produce an int so I can return it?

Here is my Java code:

 public int getNumberOfWords(java.lang.String parameter) {

 int words;

        String [] sentence = parameter.split(" ");
        words = sentence.length;

        return words;





 public int getNumberOfSymbols(java.lang.String parameter) {
        //TODO implement this method
        //throw new UnsupportedOperationException("Not implemented yet.");
   return (int) parameter.chars()
            .distinct()
            .count();



 public java.lang.String invertString(java.lang.String text) {
    //TODO implement this method
    //throw new UnsupportedOperationException("Not implemented yet.");
     int i, len = text.length();
StringBuilder dest = new StringBuilder(len);

for (i = (len - 1); i >= 0; i--){
    dest.append(text.charAt(i));
}

return dest.toString();



 public int findSubstr(java.lang.String text, java.lang.String substr) {
      return text.indexOf(substr);

So the first 3 functions are problematic. I even tried with @Produces application/json type.

Answer 1

@Produces（“ application / json”）这样，您基本上就可以将大多数RESTFull必须映射到客户端对象的方法从方法中返回json，即使它是String或Integer之类的简单对象也是如此。

Answer 2

It's not possible return an int, @Produces defines which MIME type is provided by the method. In your case the most suitable should be plain text.