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struts2的通配符用法

2016-01-27 21:20 387 查看

1、 ActionMethod：Action执行的时候并不一定要执行execute方法，可以在配置文件中配置action的时候用“method”属性来指定执行哪个方法，也可以在url地址中动态指定（动态方法调用DMI）Struts.xml文件的配置：

<?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>

<constant name="struts.devMode" value="true" />

<package name="user" extends="struts-default" namespace="/user">

<action name="userAdd" class="com.bjsxt.struts2.user.action.UserAction" method="add">

<result>/user_add_success.jsp</result>

</action>

<action name="user" class="com.bjsxt.struts2.user.action.UserAction">

<result>/user_add_success.jsp</result>

<result name="delete">/user_delete_success.jsp</result>

</action>

</package>

</struts>

Index.jsp页面的内容：

<?xml version="1.0" encoding="GB18030" ?>

<%@ page language="java" contentType="text/html;
charset=GB18030"

pageEncoding="GB18030"%>

<% String context = request.getContextPath(); %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html;
charset=GB18030" />

<title>Insert title here</title>

</head>

<body>

<a href="<%=context
%>/user/userAdd">添加用户</a> 

<a href="<%=context
%>/user/user!add">添加用户</a> 

<a href="<%=context
%>/user/user!delete">删除用户</a> 

</body>

</html>

UserAction的内容：

package com.bjsxt.struts2.user.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport
{

public String
add() {

return SUCCESS;

}

public String
delete(){

return "delete";

}

}

2、使用通配符

Strtus.xml文件的配置

<?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>

<constant name="struts.devMode" value="true" />

<package name="actions" extends="struts-default" namespace="/actions">

<action name="Student*" class="com.bjsxt.struts2.action.StudentAction" method="{1}">

<result>/Student{1}_success.jsp</result>

</action>

<action name="*_*" class="com.bjsxt.struts2.action.{1}Action" method="{2}">

<result>/{1}_{2}_success.jsp</result>

</action>

</package>

</struts>

Action的内容：

public class CourseAction extends ActionSupport
{

public String
add() {

return SUCCESS;

}

public String
delete() {

return SUCCESS;

}

}

public class StudentAction extends ActionSupport
{

public String
add() {

return SUCCESS;

}

public String
delete() {

return SUCCESS;

}

}

public class TeacherAction extends ActionSupport
{

public String
add() {

return SUCCESS;

}

public String
delete() {

return SUCCESS;

}

}

Index.jsp页面的内容：

<?xml version="1.0" encoding="GB18030" ?>

<%@ page language="java" contentType="text/html;
charset=GB18030"

pageEncoding="GB18030"%>

<%String context = request.getContextPath();%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html;
charset=GB18030" />

<title>Insert title here</title>

</head>

<body>

使用通配符，将配置量降到最低 

<a href="<%=context%>/actions/Studentadd">添加学生</a>

<a href="<%=context%>/actions/Studentdelete">删除学生</a> 

不过，一定要遵守"约定优于配置"的原则 

<a href="<%=context%>/actions/Teacher_add">添加老师</a>

<a href="<%=context%>/actions/Teacher_delete">删除老师</a>

<a href="<%=context%>/actions/Course_add">添加课程</a>

<a href="<%=context%>/actions/Course_delete">删除课程</a>

</body>

</html>

相应的jsp页面有：

Course_add_seccess.jsp

Course_delete_success.jsp

Teacher_add_seccess.jsp

Teacher_delete_success.jsp

Studentadd_success.jsp

Studentdelete_success.jsp

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