Java Servlet为POST请求返回错误405(方法不允许)

Question

我的服务工作正常,但是当我调用POST(使用jquery ajax $ .post)时,我得到错误405(方法不允许)

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");
    }
}

Answer 1

你确定你真的覆盖了doPost方法吗？

签名如下所示:

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

但你这样指定:

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

我不确定是否允许这样做: 使用新的已检查异常覆盖Java接口

请尝试以下步骤:

1. 添加@Override注释
2. 删除抛出IllegalStateException(应该不是问题,因为它是运行时异常)

Answer 2

当我的方法调用时,这发生在我身上

"super.doGet(req,resp)"或"super.doPost(req,resp)".

我从doGet和doPost中删除了上面的超类调用后,它运行正常.

事实上,这些超类调用代码是由Eclipse IDE模板插入的.