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IoC 前台显示后台输入的内容

2024-07-24 13:29:34   222人阅读

 

 

 

1. 实现接口: implements SessionAware,RequestAware,ApplicationAware　　

　　//自动取得session,request,application元素

　　//可以自己取得元素: session = ActionContext.getContext().getSession();

2. 创建Map元素

    private Map session;　　　　//一般都是用这种
    private Map requsest;
    private Map application;

3. 输入map元素的键与值

        session.put("sessionDemo", "session is run");
        requsest.put("requestDemo","request is run");
        application.put("applicationDemo","application is run");

4. 在实现的public void setSession(Map<String, Object> session)方法中添加

　　this.session = session;

5. 在前台页面取得值

　　5.1 使用jsp标签取值

　　　　　　前台输入jsp的标签: <%@taglib uri="/struts-tags" prefix="s" %>

　　　　或直接取值:

　　　　　　    <s:property value="http://www.mamicode.com/#session.sessionDemo"/>  ||  <%=session.getAttribute("sessionDemo") %><br>
   　　　　　　 <s:property value="http://www.mamicode.com/#request.requestDemo"/>  ||  <%=request.getAttribute("requestDemo") %><br>
  　　　　　　  <s:property value="http://www.mamicode.com/#application.applicationDemo"/>  ||  <%=application.getAttribute("applicationDemo") %>

　　　　取得值相同

 

 

//java代码部分

 1 public class UserAction extends ActionSupport implements SessionAware,RequestAware,ApplicationAware{ 2     private User user; 3     private Map session; 4     private Map requsest; 5     private Map application; 6      7     public String add(){ 8          9 //        session = ActionContext.getContext().getSession();10         session.put("sessionDemo", "session is run");11         requsest.put("requestDemo","request is run");12         application.put("applicationDemo","application is run");13         14         15         System.out.println("User is run.");16         System.out.println("name="+ user.getName());17         System.out.println("age="+user.getAge());18         return SUCCESS;19     }20     public User getUser() {21         return user;22     }23     public void setUser(User user) {24         System.out.println("setUser run");25         this.user = user;26     }27     @Override28     public void setApplication(Map<String, Object> application) {29         // TODO 自动生成的方法存根30         this.application = application;31     }32     @Override33     public void setRequest(Map<String, Object> request) {34         // TODO 自动生成的方法存根35         this.requsest = request;36     }37     @Override38     public void setSession(Map<String, Object> session) {39         // TODO 自动生成的方法存根40         this.session = session;41     }42     43     44 }

//jsp部分

1   <body>2     This is User page <br>3     4     <s:property value="#session.sessionDemo"/>  ||  <%=session.getAttribute("sessionDemo") %><br>5     <s:property value="#request.requestDemo"/>  ||  <%=request.getAttribute("requestDemo") %><br>6     <s:property value="#application.applicationDemo"/>  ||  <%=application.getAttribute("applicationDemo") %>7     8   </body>

 

IoC 前台显示后台输入的内容


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