Struts2 中action之间的跳转(分享)

2021-12-05 23:40:16

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>
<package name="limin" extends="struts-default">
<action name="sa1_*" class="com.Action.StrAction1" method="{1}">
<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 plain
copy
print
?

<?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="limin" extends="struts-default">
<action name="sa1_*" class="com.Action.StrAction1" method="{1}">
<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 plain
copy
print
?

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 plain
copy
print
?

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;
}
}

码农公寓

相关文章