对于POST请求，Java Servlet返回错误405（方法不允许） [英] Java Servlet return error 405 (Method Not Allowed) for POST request

问题描述

我的服务对于获取请求很好，但是当我调用POST（使用jquery ajax $ .post）时，我收到错误405（方法不允许）

My servet work fine for get requests but when I call POST (using jquery ajax $.post) I get error 405 (Method Not Allowed)

这是我的代码：

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class init extends HttpServlet {
    public init() { }
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/plain");
        PrintWriter out = response.getWriter();
        out.println("GET");
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, IllegalStateException {
        response.setContentType("application/json");
        ServletInputStream in = request.getInputStream();
        PrintWriter out = response.getWriter();
        out.print("POST");
    }
}

推荐答案

是你确定你实际上覆盖了doPost方法吗？

Are you sure that you actually override the doPost Method?

签名如下所示：

protected void doPost(HttpServletRequest req, HttpServletResponse resp)
           throws ServletException, java.io.IOException

但是你这样指定：

public void doPost(HttpServletRequest request, HttpServletResponse response) 
           throws ServletException, IOException, IllegalStateException

我不确定是否允许这样做：
< a href =https://stackoverflow.com/questions/11835633/overriding-java-interfaces-with-new-checked-exceptions>使用新检查的异常覆盖Java接口

I am not sure whether this is allowed: Overriding Java interfaces with new checked exceptions

请尝试以下步骤：

1. 添加@Override注释


2. 删除抛出IllegalStateExceptio n（应该不是问题，因为它是运行时异常）

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