Struts2 中action之间的跳转(分享)

例如从你的login.action到register.action  有两种实现方式

1. 设置type="redirect"
<package  name="struts" extends="struts-default">  
          <action name="login" class="com.aihua.example.LoginAction">  
              <result name="success"  type="redirect">register.action </result>  
              <result name="error">/index.jsp  </result>  
          </action> 

      </package> 

2.设置 type="chain"

<package  name="struts" extends="struts-default">  
          <action name="login" class="com.aihua.example.LoginAction">  
              <result name="success"  type="chain" >action 名称 </result>  
              <result name="error">/index.jsp </result>  
          </action>   
</package>  
当type为chain 时，说明是action链,运行完第一个action java文件接着会运行第二个action JAVA 文件，相当于forward(客户端的url不会改变).当type为redirect时，说明会跳转到第二个action的url (客户端的url会改变)

从action1直接跳转到action2,有两种方法： 

1. 需要保存前一个action的属性信息时使用，保存住action1的request对象: 
     <result type= "chain " name="a2">action2</result> 
2. 不保存前一个action的参数可以用这种方法: 
      <result  type= "redirectAction "> action2</result> 

Struts.xml

 <?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>

 <!--一个action跳转到另一个action 跳转方式为chain 会保留request对象 redirectAction 则不能保留-->
 <package name="limin" extends="struts-default">
 <action name="sa1_*" class="com.Action.StrAction1" method="{1}">
 <!--<result type="chain" name="sa2">sa2_sa2</result>  -->
 <result type="redirectAction" name="sa2">sa2_sa2</result>
 </action>

 <action name="sa2_*" class="com.Action.StrAction2" method="{1}">
 <result>/index.jsp</result>
 </action>
 </package>

 </struts>

 <?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>

 <!--一个action跳转到另一个action 跳转方式为chain 会保留request对象 redirectAction 则不能保留-->
 <package name="limin" extends="struts-default">
 <action name="sa1_*" class="com.Action.StrAction1" method="{1}">
 <!--<result type="chain" name="sa2">sa2_sa2</result>  -->
 <result type="redirectAction" name="sa2">sa2_sa2</result>
 </action>

 <action name="sa2_*" class="com.Action.StrAction2" method="{1}">
 <result>/index.jsp</result>
 </action>
 </package>

 </struts>

action1

 public class StrAction1 {
     String a ="liminhappygirl";
     public String getA() {
         return a;
     }
     public void setA(String a) {
         this.a = a;
     }
     public String sa1() {
         HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get(ServletActionContext.HTTP_REQUEST);
         request.setAttribute("limin", "happygirl");
         System.out.println("sal已经执行");
         return "sa2";
     }

 }

 public class StrAction1 {
     String a ="liminhappygirl";
     public String getA() {
         return a;
     }
     public void setA(String a) {
         this.a = a;
     }
     public String sa1() {
         HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get(ServletActionContext.HTTP_REQUEST);
         request.setAttribute("limin", "happygirl");
         System.out.println("sal已经执行");
         return "sa2";
     }

 }

action2

 public class StrAction2 {
     public String sa2() {
         HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get(ServletActionContext.HTTP_REQUEST);
         //当type="chain" 时能保存住request对象
         System.out.println(request.getAttribute("limin"));
         return Action.SUCCESS;
     }
 }

 public class StrAction2 {
     public String sa2() {
         HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get(ServletActionContext.HTTP_REQUEST);
         //当type="chain" 时能保存住request对象
         System.out.println(request.getAttribute("limin"));
         return Action.SUCCESS;
     }
 }