这是将字符串转换为列表的正确方法吗？
List styles = (List)request.getParameter("styles");
Model (BeerExpert.java)
package com.example.model;
import java.util.*;
public class BeerExpert {
public List getBrands(String color){
List brands = new ArrayList();
if(color.equals("amber")){
brands.add("Jack Amber");
brands.add("Red Moose");
}
else{
brands.add("Jail Pale Ale");
brands.add("Gout Scott");
}
return brands;
}
}
接下来是servlet类
BeerSelect.java
package com.example.web;
import com.example.model.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class BeerSelect extends HttpServlet {
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws IOException,ServletException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("Beer Selection Advice <br>");
String c = request.getParameter("color");
BeerExpert be = new BeerExpert();
List result = be.getBrands(c);
request.setAttribute("styles", result);
RequestDispatcher view = request.getRequestDispatcher("results.jsp");
view.forward(request, response);
}
}
最后是jsp。
results.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@page import="java.util.*" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1 align="center">Beer Recommendations in JSP!!!</h1>
<%
List styles = (List)request.getParameter("styles");
Iterator it = styles.iterator();
while(it.hasNext()){
out.print("<br> try " + it.hasNext());
}
%>
</body>
</html>
谢谢
最佳答案
List<String> list = Arrays.asList(yourString);
请记住，您将无法更改列表的内容。如果您需要这样做，请手动从这个列表创建另一个列表。
关于Java - 将字符串转换为列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7862829/