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JSP

JSP

第一步：导入jar包

其中我们需要用到的jar包是：javax.servlet.jsp.jstl.jar包和jstl-impl.jar包

我们需要在pom.xml文件中添加一下代码(JSP所需要的jar的坐标)

<dependency>
  <groupId>javax.servlet.jsp</groupId>
  <artifactId>javax.servlet.jsp-api</artifactId>
  <version>2.3.3</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>jstl</artifactId>
  <version>1.2</version>
</dependency>
<dependency>
  <groupId>taglibs</groupId>
  <artifactId>standard</artifactId>
  <version>1.1.2</version>
</dependency>

第二步:创建java文件

创建Soft.java文件,并在其中添加以下代码:

(该文件用于填写各个选项的名称)

package com.zeng.pojo;
​
public class Soft {
    private int id;
    private String softName;
    private String version;
    private String description;
    private String adress;
​
    public Soft(){
​
    }
    public Soft(int id,String softname,String version,String description,String adress){
        this.id = id;
        this.softName = softname;
        this.version = version;
        this.description = description;
        this.adress = adress;
​
    }
    public int getId(){
        return id;
    }
​
    public void setId(int id) {
        this.id = id;
    }
​
    public String getSoftName(){
        return softName;
    }
​
    public void setSoftName(String softName){
        this.softName = softName;
    }
​
    public String getVersion(){
        return version;
    }
​
    public void setVersion(String version){
        this.version = version;
    }
​
    public String getDescription(){
        return description;
    }
    public void setDescription(String description){
        this.description = description;
    }
​
    public String getAdress(){
        return adress;
    }
​
    public void  setAdress(String adress){
        this.adress = adress;
    }
    }

创建JspData.java文件

该文件用于抓取各个版本编号

package com.zeng.servlet;
​
import com.zeng.pojo.Soft;
​
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 java.io.IOException;
import java.util.ArrayList;
import java.util.List;
@WebServlet("/jstl")
public class JspData extends HttpServlet{
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        List<Soft> softs=new ArrayList<Soft>();
        softs.add(new
                Soft(1,"jdk","1.8","jdk","https://www.oracle.com/java/technologies/downl oads/"));
                softs.add(new
                        Soft(2,"maven","3.8","maven","https://maven.apache.org/download.cgi"));
        softs.add(new
                Soft(3,"tomcat","9.0","tomcat","https://tomcat.apache.org/"));
        softs.add(new Soft(4,"idea","2021.3",
                "idea","https://www.jetbrains.com/idea/download/#section=windows"));
        req.setAttribute("softs",softs);
// req.setAttribute("sex",1);
        req.getRequestDispatcher("/foreach-demo.jsp").forward(req,resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse
            resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

第三步:创建jsp文件

<%--
Created by IntelliJ IDEA.
User: zengx
Date: 2022/3/20
Time: 20:04
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
运行结果
<head>
    <title>forEach</title>
</head>
<body>
<h3>JavaEE开发环境相关软件</h3>
<table>
    <tr>
        <th>序号</th>
        <th>软件名称</th>
        <th>版本</th>
        <th>功能</th>
        <th>下载地址</th>
    </tr>
    <c:forEach items="${softs}" var="soft" >
        <tr>
            <td>${soft.id}</td>
            <td>${soft.softName}</td>
            <td>${soft.version}</td>
            <td>${soft.description}</td>
            <td>${soft.adress}</td>
        </tr>
    </c:forEach>
</table>
</body>
</html>

实现效果：

 

posted on 2022-04-08 11:44  唐玊  阅读(103)  评论(0)    收藏  举报