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Struts2使用OGNL表达式封装输入数据(直接封装Map类型)

StrutsJSPHTML 
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struts2使用OGNL表达式封装数据，不仅支持对象，而且还支持诸如List,Map的容器

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 java.util.Map;

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

public class LoginAction implements Action...{
 
 
private String tip;

private Map<String,User> users;



public Map<String, User> getUsers() ...{
    return users;
}

public void setUsers(Map<String, User> users) ...{
    this.users = users;
}

public String execute() throws Exception...{
    //用第一个user做逻辑判断
      if(this.getUsers().get("one").getUsername().equals("admin")&&this.getUsers().get("one").getPassword().equals("1234"))...{
          ActionContext.getContext().getSession().put("user", this.getUsers().get("one").getUsername());
          BookService bs=new BookService();
          this.getUsers().get("one").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

 

<%...@ 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="users['one'].username" key="username"></s:textfield>
       <s:textfield name="users['one'].password" key="password"></s:textfield>
       <s:textfield name="users['two'].username" key="username"></s:textfield>
       <s:textfield name="users['two'].password" key="password"></s:textfield>
       <s:submit value="login"></s:submit>
     </s:form>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
   
  </body>
</html>

上面使用users['one'].username直接将输入数据封装成Map容器中的两个对象

 

 

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