我的第一个JavaBean-优快云博客

本文介绍了一个简单的Java Bean类与JSP页面交互的例子，通过ColumnBean和ColumnContentBean两个类展示了如何在JSP中使用Java Bean来传递和显示数据。

/*
* ColumnBean.java
*
* Created on 2007年1月8日, 下午10:28
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/

package ColumnPackage;

/**
*
* @author Administrator
*/
public class ColumnBean {

    /** Creates a new instance of ColumnBean */
   // public ColumnBean() {
// }

    //属性
   private String columnID;
    //getter方法

   public String getColumnID()
   {
   return this.columnID;
   }

   //setter方法
   public void setColumnID(String c)
   {
      this.columnID=c;
   }
}

/*
* ColumnContentBean.java
*
* Created on 2007年1月8日, 下午10:35
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/

package ColumnPackage;

/**
*
* @author Administrator
*/
public class ColumnContentBean {
    private ColumnBean columnAtrBean;
    private String mycolumnID;
    /** Creates a new instance of ColumnContentBean */
    public ColumnContentBean() {
    }

     public void setColumnAtrBean(ColumnBean c)
   {
      this.columnAtrBean=c;
   }

    public void setMycolumnID(String c)
   {
      this.mycolumnID=c;
   }
    public String returnHTML()
    {
        return "this is a test,ColumnID:   " + this.columnAtrBean.getColumnID() ;
    }
}

jsp调用：

<%@page contentType="text/html;charset=gb2312" %>
<jsp:useBean id="myColumnBean" class="ColumnPackage.ColumnBean" scope="page">
<jsp:setProperty name="myColumnBean" property="*"/>
</jsp:useBean>
<jsp:useBean id="regist" class="ColumnPackage.ColumnContentBean" scope="page"/>

<%
// String myColumnIDValue = (String)request.getParameter( "columnID" );
//regist.setMycolumnID( myColumnIDValue );

                                                            regist.setColumnAtrBean( myColumnBean );

                                                               // regist.returnHTML();
                                                                out.println( regist.returnHTML() );%>
        ewrwrweeeeeeeeeeeeeeeeeeee

</body>

</html>

以上红色代码为一样的调用效果