2008-02-25

Struts2使用OGNL表达式封装输入数据

我们在action中有一个封装好的user对象，其中有username和password两个属性

我们可以在页面上直接使用user,username作为输入框的名字，struts2可以直接把输入的username和password封装到user对象中，这点和webwork2如出一辙

 

User.java

 

package HelloWorld;

public class User {
    private String username;
      private String password;
      private String[] books;
      public String[] getBooks() {
            return books;
        }
        public void setBooks(String[] books) {
            this.books = books;
        }
        public String getUsername() {
            return username;
        }
        public void setUsername(String username) {
            this.username = username;
        }
        public String getPassword() {
            return password;
        }
        public void setPassword(String password) {
            this.password = password;
        }
}

LoginAction.java

 

package HelloWorld;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;

public class LoginAction implements Action{
 
 
private String tip;

  private User user;

public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}

public String execute() throws Exception{
      if(this.getUser().getUsername().equals("admin")&&this.getUser().getPassword().equals("1234")){
          ActionContext.getContext().getSession().put("user", this.getUser().getUsername());
          BookService bs=new BookService();
          this.getUser().setBooks(bs.getBooks());
          this.setTip("welcome welcome");
          return SUCCESS;
      }else{
          return ERROR;
      }
  }

public String getTip() {
    return tip;
}
public void setTip(String tip) {
    this.tip = tip;
}


  
}

index.jsp输入页面

 

<%@ page language="java" contentType="text/html; charset=gb2312"
    pageEncoding="gb2312"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
  <head> 
    <title></title>
  </head>
  <body>      

     <s:form action="Login">
       <s:textfield name="user.username" key="username"></s:textfield>
       <s:textfield name="user.password" key="password"></s:textfield>
       <s:submit value="login"></s:submit>
     </s:form>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
   
  </body>
</html>

 

 

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