问题出在哪里呢？显示405错误
corse类
package com.course;
public class Course {
private String id;
private String name;
private String category;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
@Override
public String toString() {
return "Course [id=" + id + ", name=" + name + ", category=" + category + "]";
}
}
Servlet文件
package com.course;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.course.Course;
/**
* Servlet implementation class CourseServlet
*/
@WebServlet("/index")
public class CourseServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public CourseServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @param Course
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response, Object Course) throws ServletException, IOException {
// TODO Auto-generated method stub
String level = request.getParameter("level");
Course course = new Course();
course.setId("0001");
course.setName("Java");
course.setCategory("计算机类");
request.setAttribute("course", course);
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
}
jsp文件
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>Id:${requestScope.course.id }</h2>
<h2>Name:${requestScope.course.name }</h2>
<h2>Category:${requestScope.course.category }</h2>
<h2>Level:${param.level }</h2>
</body>
</html>
正在回答
同学，你好！405错误产生的原因一般是请求的方法不存在，比如此时执行Servlet会发送请求到doGet()方法执行，但doGet()方法不支持。
查找错误发现：doGet方法中多了一个参数，就不是从HttpServlet继承来的doGet()方法了，因此执行Servlet的时候找不到对应的doGet方法了。修改建议就是把doGet()方法中的第三个参数去掉。
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