如何使用java方法在jsp中打印arraylist
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how to Print arraylist in jsp using java method
提问by user2837886
This is Java class:
这是Java类：
package com.example;
import java.util.ArrayList;
public class sample {
public void print() {
ArrayList<String> l = new ArrayList<String>();
l.add("a");
l.add("b");
}
}
This is my Jsp page :
这是我的 Jsp 页面：
<%@page import="java.awt.List"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="com.example.sample"%>
<%@page import="java.util.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
sample s = new sample();
%>
</body>
</html>
I dont know how to call print merhod and how Print list in jsp page so that i print data in jsp page list please help me how i will Implement i am learning this.
我不知道如何调用print merhod以及如何在jsp页面中打印列表，以便我在jsp页面列表中打印数据，请帮助我如何实现我正在学习这个。
采纳答案by Suresh Atta
First return a list from print method
首先从打印方法返回一个列表
public List<String> print() {
ArrayList<String> l = new ArrayList<String>();
l.add("a");
l.add("b");
return l;
}
Don't use scriplets, Use JSTL
不要使用脚本，使用 JSTL
<%
sample s = new sample(); //not recommended.Pass this object from servlet
List<String> list = s.print();
%>
with that print where ever you want to print in jsp
使用该打印件在您想要打印的任何位置 jsp
With JSTL
和 JSTL
<c:forEach items="${list}" var="item">
${item}<br>
</c:forEach>
With scriplets (not recommended);
带脚本（不推荐）；
<% for (int i=0;i<list.size();i++)
{
out.println(list.get(i));
} %>
With help of iterator;
在的帮助下iterator；
<% Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
out.println(<iterator.next());
}
%>
Side note:Not tested ,and make sure that you have imported all used classes in JSP.
旁注：未测试，并确保您已在JSP 中导入所有使用的类。
回答by Chirag Kathiriya
<%
Class c = new Class();
List<String> list = c.print();
for (c : list) {
//print list here
}
%>
