servlet如何始终执行相同的任务？(How can a servlet always perform the same task?)

 我希望Servlet始终执行相同的任务。 无论是GET还是POST。 目前我只是从doPost()调用doGet() doPost() ，这很好。 
 
 然后我尝试重写service()方法，我认为它会以同样的方式工作。 但事实并非如此！ 
 
 代码以某种方式执行，但响应不生成网页： 
 
response.getWriter();
response.println(string); 
 
 此代码适用于doGet / doPost方法，但不适用于该服务。 为什么？ 
 
 Servlet的： 
 
class MyWebServlet extends HttpServlet {
    @Override
    public void service(ServletRequest request, ServletResponse response) {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        String string = "teststring";
        out.println(string);
    }
}

I want a Servlet to perform always the same tasks. Regardless of if it is a GET or POST. At the moment I just call the doGet() from doPost(), which works fine.
 
Then I tried overriding the service() method, and I thought it would just work the same way. But it does not!
 
The code somehow gets executed, but the response does not generate the webpage:
 
response.getWriter();
response.println(string); 
 
This code works for the doGet/doPost methods, but not for the service. Why?
 
Servlet:
 
class MyWebServlet extends HttpServlet {
    @Override
    public void service(ServletRequest request, ServletResponse response) {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        String string = "teststring";
        out.println(string);
    }
}

原文：https://stackoverflow.com/questions/12637084