第11講 struts2的struts.xml的萬用字元控制
阿新 • • 發佈：2018-11-10
1複製HeadFirstStruts2chapter02-04，改名：HeadFirstStruts2chapter02-05，修改web project settings匯入StudentAction和GradeAction，刪除其他多餘的Action，
StudentAction如下：
package com.cruise.action;
import com.opensymphony.xwork2.ActionSupport;
public class StudentAction extends ActionSupport{
private
public String getName() {
return name;
}
public void setName(String name) {
this
}
public String list()throws Exception{
System.out.println("學生查詢");
name="學生查詢";
return SUCCESS;
}
public
System.out.println("學生新增");
name="學生新增";
return SUCCESS;
}
public String update()throws Exception{
System.out.println("學生修改");
name="學生修改";
return SUCCESS;
}
public String delete()throws Exception{
System.out.println("學生刪除");
name="學生刪除";
return SUCCESS;
}
}
GradeAction如下：
package com.cruise.action;
import com.opensymphony.xwork2.ActionSupport;
public class GradeAction extends ActionSupport{
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String list()throws Exception{
System.out.println("班級查詢");
name="班級查詢";
return SUCCESS;
}
public String add()throws Exception{
System.out.println("班級新增");
name="班級新增";
return SUCCESS;
}
public String update()throws Exception{
System.out.println("班級修改");
name="班級修改";
return SUCCESS;
}
public String delete()throws Exception{
System.out.println("班級刪除");
name="班級刪除";
return SUCCESS;
}
}
2刪除多餘.xml檔案，保留struts.xml檔案，修改struts.xml檔案，使用佔位符來確定方法名，
xml version="1.0" encoding="UTF-8" ?>
DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="manage" namespace="/" extends="struts-default">
<action name="student_*" class="com.cruise.action.StudentAction" method="{1}">
<result name="success">success.jspresult>
action>
<action name="grade_*" class="com.cruise.action.GradeAction" method="{1}">
<result name="success">success.jspresult>
action>
package>
struts>
ps：如果標籤的namespace不是“/”，則在標籤裡面跳轉頁面路徑的時候，需要在前面加${pageContext.request.contextPath}/
3匯入index.jsp 檔案，修改success.jsp檔案，
index.jsp檔案如下：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
head>
<body>
<h1>萬用字元h1>
<a href="student_list" target="_blank">學生資訊查詢a>
<a href="student_add" target="_blank">學生資訊新增a>
<a href="student_update" target="_blank">學生資訊修改a>
<a href="student_delete" target="_blank">學生資訊刪除a>
<br/><br/>
<a href="grade_list" target="_blank">班級資訊查詢a>
<a href="grade_add" target="_blank">班級資訊新增a>
<a href="grade_update" target="_blank">班級資訊修改a>
<a href="grade_delete" target="_blank">班級資訊刪除a> <br/>
body>
html>
success.jsp檔案如下：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
head>
<body>
OK!!${name}
body>
html>
4測試
http://localhost:8080/HeadFirstStruts2chapter02_05
5萬用字元升級版：修改struts.xml檔案。
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="manage" namespace="/" extends="struts-default">
<action name="*_*" class="com.cruise.action.{1}Action" method="{2}">
<result name="success">success.jsp</result>
</action>
</package>
</struts>
6萬用字元升級版：修改index.jsp，修改首字母的大小寫,這裡主要是和Action匹配
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>萬用字元</h1>
<a href="Student_list" target="_blank">學生資訊查詢</a>
<a href="Student_add" target="_blank">學生資訊新增</a>
<a href="Student_update" target="_blank">學生資訊修改</a>
<a href="Student_delete" target="_blank">學生資訊刪除</a>
<br/><br/>
<a href="Grade_list" target="_blank">班級資訊查詢</a>
<a href="Grade_add" target="_blank">班級資訊新增</a>
<a href="Grade_update" target="_blank">班級資訊修改</a>
<a href="Grade_delete" target="_blank">班級資訊刪除</a> <br/>
</body>
</html>
7測試