我这个好像显示不了，麻烦帮我看一下，那里需要改一下
来源：1-12 自由编程
M灬spirit
2020-03-17 17:50:30
package com.imooc.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;
}
public void Course(String id,String name,String category) {
this.setId(id);
this.setName(name);
this.setCategory(category);
}
public String toString() {
return "id:"+id+",name:"+name+",category"+category;
}
}
package com.imooc.course;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class CourseServlet
*/
@WebServlet("/cs")
public class CourseServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public CourseServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Course cou=new Course();
cou.setId("1");
cou.setName("语文");
cou.setCategory("文科");
request.setAttribute("courese", cou);
request.getRequestDispatcher("/course.jsp").forward(request, response);
}
}
<%@ 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.cou.id }</h2>
<h2>name: ${ requestScope.cou.name }</h2>
<h2>category: ${ requestScope.cou.category }</h2>
<h2> ${ cou }</h2>
<h2>level: ${ param.stu.level }</h2>
</body>
</html>
2回答
-
好帮手慕小尤
2020-03-17
同学你好，1. 同学是否是直接访问的jsp文件，如果是，则无法展示，建议同学访问了Servlet展示信息，如下图所示：
2. 如果同学想要展示url中的信息，则同学可以通过${param.level }展示。如下图所示：
3. 如果还存在问题，建议同学反馈访问截图与报错截图。
如果我的回答解决了你的疑惑，请采纳！祝学习愉快！
0 -
好帮手慕小尤
2020-03-17
同学你好，1. 在jsp中应该提供courese进行展示。修改后代码如下所示：
2. 建议同学在Course类创建带参构造与无参构造，修改后代码如下所示：
如果我的回答解决了你的疑惑，请采纳！祝学习愉快！
0h020-03-17
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