动态方法调用-深入Struts2

一 提出背景

动态方法调用是为了解决一个Action对应多个请求的处理，以免Action太多。

 

二 解决方法

 

 

三 方案1——指定method属性

1、Action编写

package com.cakin.action;

 

import com.opensymphony.xwork2.ActionSupport;

 

public class HelloWorldAction extends ActionSupport {

        @Override

        public String execute() throws Exception {

                System.out.println("执行Action");

                return SUCCESS;

        }

        

        public String add()

        {

                return SUCCESS;

        }

        

        public String update()

        {

                return SUCCESS;

        }

}

2、Struts编写

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<struts>

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

                <action name="helloworld" class="com.cakin.action.HelloWorldAction">

                        <result>/result.jsp</result>

                </action>

                

                <action name="addAction" method="add" class="com.cakin.action.HelloWorldAction">

                        <result>/add.jsp</result>

                </action>

                <action name="updateAction" method="update" class="com.cakin.action.HelloWorldAction">

                        <result>/update.jsp</result>

                </action>

        </package>

</struts>   

3、测试

 

 

四 方案2——感叹号方式

1、Action编写

package com.cakin.action;

 

import com.opensymphony.xwork2.ActionSupport;

 

public class HelloWorldAction extends ActionSupport {

        @Override

        public String execute() throws Exception {

                System.out.println("执行Action");

                return SUCCESS;

        }

        

        public String add()

        {

                return "add";

        }

        

        public String update()

        {

                return "update";

        }

}

2、Struts编写

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<struts>

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

                <action name="helloworld" class="com.cakin.action.HelloWorldAction">

                        <result>/result.jsp</result>

                        <result name="add">/add.jsp</result>

                        <result name="update">/update.jsp</result>

                </action>

        </package>

        

        <constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>

</struts>   

3、测试

 

 

五 方案3——单个通配符方式

1、Action编写

package com.cakin.action;

 

import com.opensymphony.xwork2.ActionSupport;

 

public class HelloWorldAction extends ActionSupport {

        @Override

        public String execute() throws Exception {

                System.out.println("执行Action");

                return SUCCESS;

        }

        

        public String add()

        {

                return "add";

        }

        

        public String update()

        {

                return "update";

        }

}

2、Struts编写

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<struts>

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

                <action name="helloworld_*" method="{1}" class="com.cakin.action.HelloWorldAction">

                        <result>/result.jsp</result>

                        <result name="add">/{1}.jsp</result>

                        <result name="update">/{1}.jsp</result>

                </action>

        </package>

        

        <constant name="struts.enable.DynamicMethodInvocation" value="false"></constant>

</struts>   

3、测试

 

 

六 方案3——多个通配符方式

1、Action编写

package com.cakin.action;

 

import com.opensymphony.xwork2.ActionSupport;

 

public class HelloWorldAction extends ActionSupport {

        @Override

        public String execute() throws Exception {

                System.out.println("执行Action");

                return SUCCESS;

        }

        

        public String add()

        {

                return "add";

        }

        

        public String update()

        {

                return "update";

        }

}

2、Struts编写

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<struts>

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

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

                        <result>/result.jsp</result>

                        <result name="add">/{2}.jsp</result>

                        <result name="update">/{2}.jsp</result>

                </action>

        </package>

        

        <constant name="struts.enable.DynamicMethodInvocation" value="false"></constant>

</struts>   

3、测试