请看下还有需要改进的吗，感觉jsp既能当html展示，又能当servlet动态处理，很万能啊
来源：1-12 自由编程
慕无忌8417539
2020-04-28 12:19:58
1、定义一个课程类Course
package com.imooc.servlet.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 + "]";
}
}
2、创建一个CourseServlet
package com.imooc.servlet.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("/course")
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 cs=new Course();
cs.setId("001");
cs.setName("小明");
cs.setCategory("数学");
request.setAttribute("cs", cs);
request.getRequestDispatcher("/course.jsp").forward(request, response);
}
}
3、course.jsp，使用el表达式输出course对象的属性值
<%@ 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>
<h1>${cs.id }</h1>
<h1>${cs.name }</h1>
<h1>${cs.category }</h1>
<h1>${cs}</h1>
</body>
</html>
4、demo.jsp，EL表达式获取level参数的值并输出
<%@ 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>
<h1>${param.level}</h1>
</body>
</html>
1回答
-
同学你好，代码完成的很好！不需要修改啦。JSP将内容的生成和显示进行分离，可以很容易的和HTML静态模板结合，也可以在网页中动态嵌入元素。祝学习愉快！
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