一口一口吃掉Struts（五）——测试Struts标签库 .

Struts标签库的使用和JSTL标签库使用方式类似。

认识可以了，建议熟练掌握JSTL标签库。struts标签库基本认识就可以了。

 

核心操作：

配置：
 * 配置国际化支持，在struts-config.xml文件中加入如下配置：
 <message-resources parameter="MessageResources" />
 * 最好提供国际化资源文件（MessageResources.properties），将该文件放到src下
 
使用：
 采用taglib引入
 <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>    
 <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>   

 

测试代码：

ACTION

[java] view plain copy print ?

1. package com.jialin;  
2.   
3. import java.util.ArrayList;  
4. import java.util.Date;  
5. import java.util.List;  
6.   
7. import javax.servlet.http.HttpServletRequest;  
8. import javax.servlet.http.HttpServletResponse;  
9.   
10. import org.apache.struts.action.Action;  
11. import org.apache.struts.action.ActionForm;  
12. import org.apache.struts.action.ActionForward;  
13. import org.apache.struts.action.ActionMapping;  
14.   
15. public class TestAction extends Action {  
16.   
17.     @Override  
18.     public ActionForward execute(ActionMapping mapping, ActionForm form,  
19.             HttpServletRequest request, HttpServletResponse response)  
20.             throws Exception {  
21.         //普通字符串   
22.         request.setAttribute("hello", "helloworld");  
23.         //html文本   
24.         request.setAttribute("world", "<font color='red'>Hello World!</font>");  
25.         //日期   
26.         request.setAttribute("today", new Date());  
27.         //数字   
28.         request.setAttribute("number", 12345.1234);  
29.           
30.         Group group = new Group();  
31.         group.setName("师院");  
32.           
33.         User user = new User();  
34.         user.setUsername("张三");  
35.         user.setAge(18);  
36.         user.setGroup(group);  
37.         //结构数据   
38.         request.setAttribute("user", user);  
39.           
40.         //空   
41.         request.setAttribute("attr1", null);  
42.         request.setAttribute("attr2", "");  
43.         request.setAttribute("attr3", new ArrayList());  
44.           
45.       
46.         //List   
47.         List userList = new ArrayList();  
48.           
49.         for (int i=0; i<10; i++) {  
50.             User user1 = new User();  
51.             user1.setUsername("张三_" + i);  
52.             user1.setAge(18 + i);  
53.             user1.setGroup(group);  
54.               
55.             userList.add(user1);  
56.         }  
57.           
58.         request.setAttribute("userlist", userList);  
59.           
60.         return mapping.findForward("showresult");  
61.     }  
62.   
63. }  

package com.jialin;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class TestAction extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		//普通字符串
		request.setAttribute("hello", "helloworld");
		//html文本
		request.setAttribute("world", "<font color='red'>Hello World!</font>");
		//日期
		request.setAttribute("today", new Date());
		//数字
		request.setAttribute("number", 12345.1234);
		
		Group group = new Group();
		group.setName("师院");
		
		User user = new User();
		user.setUsername("张三");
		user.setAge(18);
		user.setGroup(group);
		//结构数据
		request.setAttribute("user", user);
		
		//空
		request.setAttribute("attr1", null);
		request.setAttribute("attr2", "");
		request.setAttribute("attr3", new ArrayList());
		
	
		//List
		List userList = new ArrayList();
		
		for (int i=0; i<10; i++) {
			User user1 = new User();
			user1.setUsername("张三_" + i);
			user1.setAge(18 + i);
			user1.setGroup(group);
			
			userList.add(user1);
		}
		
		request.setAttribute("userlist", userList);
		
		return mapping.findForward("showresult");
	}

}

User

[java] view plain copy print ?

1. package com.jialin;  
2.   
3. public class User {  
4.   
5.     private String username;  
6.       
7.     private int age;  
8.       
9.     private Group group;  
10.   
11.     public String getUsername() {  
12.         return username;  
13.     }  
14.   
15.     public void setUsername(String username) {  
16.         this.username = username;  
17.     }  
18.   
19.     public int getAge() {  
20.         return age;  
21.     }  
22.   
23.     public void setAge(int age) {  
24.         this.age = age;  
25.     }  
26.   
27.     public Group getGroup() {  
28.         return group;  
29.     }  
30.   
31.     public void setGroup(Group group) {  
32.         this.group = group;  
33.     }  
34. }  

package com.jialin;

public class User {

	private String username;
	
	private int age;
	
	private Group group;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Group getGroup() {
		return group;
	}

	public void setGroup(Group group) {
		this.group = group;
	}
}

Group

[java] view plain copy print ?

1. package com.jialin;  
2.   
3. public class Group {  
4.   
5.     private String name;  
6.   
7.     public String getName() {  
8.         return name;  
9.     }  
10.   
11.     public void setName(String name) {  
12.         this.name = name;  
13.     }  
14. }  

package com.jialin;

public class Group {

	private String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

 

JSP

[html] view plain copy print ?

1. <%@ page language="java" contentType="text/html; charset=GB18030"  
2.     pageEncoding="GB18030"%>  
3. <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>       
4. <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>        
5.   
6.       
7. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
8. <html>  
9. <head>  
10. <meta http-equiv="Content-Type" content="text/html; charset=GB18030">  
11. <title>Insert title here</title>  
12. </head>  
13. <body>  
14. <h1>测试beanwrite标签</h1>  
15.     <li>普通字符串</li><br>  
16. hello(标签):<bean:write name="hello"/>  
17. <p></p>  
18.     <li>html文本</li><br>  
19. world(default):<bean:write name="world"/><br/>  
20. world(filter true):<bean:write name="world" filter="true"/><br/>  
21. world(filter false):<bean:write name="world" filter="false"/>  
22. <p>  
23.     <li>格式化日期</li><br>  
24.     today(default):<bean:write name="today"/><br>  
25.     today(format="yyyy-MM-dd HH:mm:ss"):<bean:write name="today" format="yyyy-MM-dd HH:mm:ss"/>  
26.     <p>  
27.     <li>格式化数字</li><br>  
28.     n(default):<bean:write name="number"/><br>  
29.     n(format="###,###.#####"):<bean:write name="number" format="###,###.#####"/><br>  
30.     n(format="###,###.00000"):<bean:write name="number" format="###,###.00000#"/><br>  
31.     <P>  
32.     <li>结构</li><br>  
33.     姓名：<input type="text" name="username" value="<bean:write name="user" property="username"/>"> <br>  
34.     年龄：<input type="text" name="userage" value="<bean:write name="user" property="age"/>"> <br>  
35.     所属组：<input type="text" name="usergroup" value="<bean:write name="user" property="group.name"/>"> <br>  
36.     <h1>测试logic:empty,logic:notEmpty,logic:present,logic:notPresent</h1>  
37.     <hr>  
38.     <logic:empty name="attr1">  
39.         atrr1为空<br>  
40.     </logic:empty>  
41.     <logic:notEmpty name="attr1">  
42.         atrr1不为空<br>  
43.     </logic:notEmpty>  
44.     <logic:present name="attr1">  
45.         atrr1存在<br>  
46.     </logic:present>  
47.     <logic:notPresent name="attr1">  
48.         atrr1不存在<br>  
49.     </logic:notPresent>  
50.     <p>  
51.     <logic:empty name="attr2">  
52.         atrr2为空<br>  
53.     </logic:empty>  
54.     <logic:notEmpty name="attr2">  
55.         atrr2不为空<br>  
56.     </logic:notEmpty>  
57.     <logic:present name="attr2">  
58.         atrr2存在<br>  
59.     </logic:present>  
60.     <logic:notPresent name="attr2">  
61.         atrr2不存在<br>  
62.     </logic:notPresent>  
63.     <p>  
64.     <logic:empty name="attr3">  
65.         atrr3为空<br>  
66.     </logic:empty>  
67.     <logic:notEmpty name="attr3">  
68.         atrr3不为空<br>  
69.     </logic:notEmpty>  
70.     <logic:present name="attr3">  
71.         atrr3存在<br>  
72.     </logic:present>  
73.     <logic:notPresent name="attr3">  
74.         atrr3不存在<br>  
75.     </logic:notPresent>  
76.     <p>  
77.       
78.     <h1>测试迭代标签</h1>  
79.     <hr>  
80.     <table border="1">  
81.         <tr>  
82.             <td>姓名</td>  
83.             <td>年龄</td>  
84.             <td>所属组</td>  
85.         </tr>  
86.         <logic:empty name="userlist">  
87.             <tr>  
88.                 <td colspan="3">没有符合条件的数据</td>  
89.             </tr>  
90.         </logic:empty>  
91.         <logic:notEmpty name="userlist">  
92.             <logic:iterate id="user" name="userlist">  
93.                 <tr>  
94.                     <td>  
95.                         <bean:write name="user" property="username"/>  
96.                     </td>  
97.                     <td>  
98.                         <bean:write name="user" property="age"/>  
99.                     </td>  
100.                     <td>  
101.                         <bean:write name="user" property="group.name"/>  
102.                     </td>  
103.                 </tr>  
104.             </logic:iterate>  
105.         </logic:notEmpty>  
106.     </table>  
107. </body>  
108. </html>  

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>     
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>      

    
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<h1>测试beanwrite标签</h1>
	<li>普通字符串</li><br>
hello(标签):<bean:write name="hello"/>
<p></p>
	<li>html文本</li><br>
world(default):<bean:write name="world"/><br/>
world(filter true):<bean:write name="world" filter="true"/><br/>
world(filter false):<bean:write name="world" filter="false"/>
<p>
	<li>格式化日期</li><br>
	today(default):<bean:write name="today"/><br>
	today(format="yyyy-MM-dd HH:mm:ss"):<bean:write name="today" format="yyyy-MM-dd HH:mm:ss"/>
	<p>
	<li>格式化数字</li><br>
	n(default):<bean:write name="number"/><br>
	n(format="###,###.#####"):<bean:write name="number" format="###,###.#####"/><br>
	n(format="###,###.00000"):<bean:write name="number" format="###,###.00000#"/><br>
	<P>
	<li>结构</li><br>
	姓名：<input type="text" name="username" value="<bean:write name="user" property="username"/>"> <br>
	年龄：<input type="text" name="userage" value="<bean:write name="user" property="age"/>"> <br>
	所属组：<input type="text" name="usergroup" value="<bean:write name="user" property="group.name"/>"> <br>
	<h1>测试logic:empty,logic:notEmpty,logic:present,logic:notPresent</h1>
	<hr>
	<logic:empty name="attr1">
		atrr1为空<br>
	</logic:empty>
	<logic:notEmpty name="attr1">
		atrr1不为空<br>
	</logic:notEmpty>
	<logic:present name="attr1">
		atrr1存在<br>
	</logic:present>
	<logic:notPresent name="attr1">
		atrr1不存在<br>
	</logic:notPresent>
	<p>
	<logic:empty name="attr2">
		atrr2为空<br>
	</logic:empty>
	<logic:notEmpty name="attr2">
		atrr2不为空<br>
	</logic:notEmpty>
	<logic:present name="attr2">
		atrr2存在<br>
	</logic:present>
	<logic:notPresent name="attr2">
		atrr2不存在<br>
	</logic:notPresent>
	<p>
	<logic:empty name="attr3">
		atrr3为空<br>
	</logic:empty>
	<logic:notEmpty name="attr3">
		atrr3不为空<br>
	</logic:notEmpty>
	<logic:present name="attr3">
		atrr3存在<br>
	</logic:present>
	<logic:notPresent name="attr3">
		atrr3不存在<br>
	</logic:notPresent>
	<p>
	
	<h1>测试迭代标签</h1>
	<hr>
	<table border="1">
		<tr>
			<td>姓名</td>
			<td>年龄</td>
			<td>所属组</td>
		</tr>
		<logic:empty name="userlist">
			<tr>
				<td colspan="3">没有符合条件的数据</td>
			</tr>
		</logic:empty>
		<logic:notEmpty name="userlist">
			<logic:iterate id="user" name="userlist">
				<tr>
					<td>
						<bean:write name="user" property="username"/>
					</td>
					<td>
						<bean:write name="user" property="age"/>
					</td>
					<td>
						<bean:write name="user" property="group.name"/>
					</td>
				</tr>
			</logic:iterate>
		</logic:notEmpty>
	</table>
</body>
</html>

测试结果：

 

下篇继续……