java 使用 struts 2 标签检索 ArrayList 的元素而不使用 s:iterate
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5180213/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Retrieve the elements of ArrayList using struts 2 tag without using s:iterate
提问by Shashi
Source Code of LoginAction.java
LoginAction.java 源代码
package com.test;
import java.util.ArrayList;
import java.util.List;
public class LoginAction {
private List list;
public void setList(List list) {
this.list = list;
}
public List getList() {
return list;
}
public String execute() {
list = new ArrayList();
list.add(new Questions("Pet Name", "Junk"));
list.add(new Questions("Nick Name", "Bunk"));
list.add(new Questions("Real Name", "Hunk"));
return "SUCCESS";
}
}
Source Code of Questions.java
Questions.java源代码
package com.test;
public class Questions {
private String question;
private String answer;
public Questions(String question, String answer) {
// TODO Auto-generated constructor stub
this.question = question;
this.answer = answer;
}
public void setQuestion(String question) {
this.question = question;
}
public String getQuestion() {
return question;
}
}
In JSP:
在 JSP 中：
The given statements
给定的陈述
<s:property="list[0]"/>
give outputs
给出输出
com.test.Questions@32bf232e1
com.test.Questions@32bf232e1
How can i fetch the value Question object using struts2 tag without using iterator?
如何在不使用迭代器的情况下使用 struts2 标签获取值 Question 对象？
回答by Thomas
Try <s:property="list[0].question"/>.
试试<s:property="list[0].question"/>。
Or <s:set name="question" value="list[0]"/>and then <s:property="#question.question"/>.
或者<s:set name="question" value="list[0]"/>然后<s:property="#question.question"/>。
回答by Fernando
Another way to get the value of a Questionobject is to add this tag:
另一种获取Question对象值的方法是添加这个标签：
<s:property value="list" />
And then adding a toStringmethod in the Questionsclass.
然后toString在Questions类中添加一个方法。
