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

Java代码



<?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>

[java] view
plaincopyprint?

<?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

Java代码



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";

}

}

[java] view
plaincopyprint?

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

Java代码



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;

}

}

[java] view
plaincopyprint?

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;

}

}