怎样向一个类传递Session？送100

直接将Attribute的值传递进去
举例如下
Class a
{
  String o=null;
  public void setObject(String o)
  {
     this.o=o;
  }
}
之后在servlet的doPost or doGet方法中：
a asdf=new a();
a.setObject(request.getSession().getAttribute("id"));

解决方案 »

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同意 study_body(珍惜每一天)
不是吧，我在jsp里
<%
session.setAttribute("username","beyond_xiruo");
%>
然后在servlet里
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;public class ttt extends HttpServlet {    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException
    {
      response.setContentType("text/html;charset=gb2312");
      request.setCharacterEncoding("GB2312");
      PrintWriter out = response.getWriter();
      out.println(request.getSession().getAttribute("username"));
    }    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException
    {
        doGet(request,response);
    }
}
打印出来的结果就是——
beyond_xiruo
如果用的是javabean，那么在
javabean里这样写
package test;
import javax.servlet.*;
import javax.servlet.http.*;public class test{
String s="";
public String action(javax.servlet.http.HttpSession session) {//把session作为参数传近来
s=(String)session.getAttribute("username");//这里就可以取到值了
}
}
在jsp里
<jsp:userBean id="test" scope="page" class="t.test" />
<%
test.action(session);//这里把session作为参数传
%>
要在一个class里面操作Session，我一般是这样来做的,不知道你是不是这个意思:
class a{
  private HttpServletRequest request;
  private HttpServletResponse response;
  /**
  *初始化
  */
  public a(HttpServletRequest request,HttpServletResponse response){
    this.request = request;
    this.response = response;
  }
  /**
  *你的处理接口
  */
  public void operatorSession(){
    HttpSession session = request.getSession("sessionName");
    /**
    接下来对Session进行操作就行了
   **/
  }
}
刚才有个错误，应该是：HttpSession session = request.getSession();
嘿嘿，不好意思
/*
* ListReadingTag.java
*
* Created at 2002-12-31 13:45
* Title:        ﾑｧﾔｺｺﾚﾏｵﾍｳ  ｷﾑﾓﾃｻｾﾐﾅﾏ｢ﾒｻﾀﾀﾒｳﾃ豬ﾄ Tag
* Copyright:    Copyright (c) 2002
* Company:      GlNPU
*/
package com.glnpu.logistic.tag;import java.util.Properties;
import java.util.List;
import java.util.Vector;import javax.naming.Context;
import javax.naming.InitialContext;
import java.rmi.RemoteException;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import javax.ejb.CreateException;import org.apache.log4j.Category;import com.glnpu.logistic.ejb.*;
import com.glnpu.logistic.common.MsgConstants;import com.glnpu.logistic.tag.BodyTagBase;
/**
*
* @author  yingping.zhang
*/
public class ListReadingTag extends ReadingTag{
/**
* ｵﾔﾓﾃｶﾔﾏ・
*/
private static Category cat = Category.getInstance( MessageTag.class.getName() );
//  ｳｼｻｯ constant ｶﾔﾏ｣
MsgConstants constants = new MsgConstants();

/**
* ｸｲｸﾇｸｸﾀ犢ｽｷｨ,ﾊ莎ML
* @return String XMLﾗﾖｷ逸ｮ
*/
public String outXMLString(){

cat.debug("ﾀ・ListReadingTag start");

String strMessage = (String)request.getAttribute("message");
StringBuffer bufXML = new StringBuffer();
try{
// ｳｼｻｯﾄﾚﾖﾃEJBｶﾔﾏ・
initEJBObject();

// ｵﾃｵｽｱ｣ｴ贇ﾚFeeRecordBeanﾖﾐｵﾄｲ鰉ｯﾌ｡｣
FeeRecordBean objFeeRecord = (FeeRecordBean)session.getAttribute("FeeRecordBean");

// ｵﾃｲ鰉ｯｷｽｷｨ｣ｬｵﾃｵｽｲ鰉ｯｽ盪・
Vector vectorFeeRecord = ManagerRemote.getReadingBySearch( objFeeRecord );
cat.debug("ｴﾓEJBﾖﾐｵﾃｵｽ Vector");


if( null == vectorFeeRecord ){
bufXML.append(getSystemXML( "ﾃｻﾓﾐﾕﾒｵｽｷ釚ﾏﾌｵﾄｼﾇﾂｼ", 0));
cat.debug("ﾃｻﾓﾐﾕﾒｵｽｷ釚ﾏﾌｵﾄｼﾇﾂｼ");
}
else{
cat.debug("ｹｹﾔ・ﾑﾓﾃｻｾﾐﾅﾏ｢ﾒｻﾀﾀﾒｳﾃ豬ﾄXML start");

int iCount = vectorFeeRecord.size();

//bufXML.append( getXMLHead() );    cocoon ｲｻﾐ靨ｪ｡｣
bufXML.append("<root><Readings>");

for( int j=0; j< iCount; j++){
//  ﾑｭｻｷｵﾄﾈ｡ｳｿﾒｻｸｿｼ莊ﾄﾐﾅﾏ｢｣ｬﾒﾀｴﾎｹｹﾔ・ｿﾒｻｸｿｼ菴ﾚｵ罍｣
FeeRecordBean objTemp = (FeeRecordBean)vectorFeeRecord.elementAt( j );
bufXML.append( getReadingXML( objTemp ) );     // getReadingXML ﾊﾇｴﾓｸｸﾀ獰ﾐｼﾌｳﾐｶｴ｡｣
}

bufXML.append("</Readings>");
strMessage = strMessage + "<br/>ｷ釚ﾏﾌｵﾄｼﾇﾂｼｹｲｼﾆ " + iCount + " ﾌ｣" ;
//  ｴﾓｸｸﾀ狆ﾌｳﾐｵﾄｷｽｷｨ｣ｬﾉ嵭ﾉｱ・ｼMessageﾒｳﾃ豬ﾄXML｡｣

bufXML.append( getSystemMsgXML( strMessage, 0 ) );

bufXML.append("</root>");

cat.debug("ｹｹﾔ・ﾑﾓﾃｻｾﾐﾅﾏ｢ﾒｻﾀﾀﾒｳﾃ豬ﾄXML end");
}
return bufXML.toString();
}
catch(java.rmi.RemoteException e){    //EJB ｴ﨔・
strMessage = constants.getString("Logistics_ERROR_009");
bufXML.append(getSystemXML(strMessage, 1));
return bufXML.toString();
}
catch(java.sql.SQLException e){    //SQL ｴ﨔・
strMessage = constants.getString("Logistics_ERROR_010");
bufXML.append(getSystemXML(strMessage, 1));
return bufXML.toString();

}
catch(DataOperationException e){    //ﾊｾﾝｲﾙﾗ﨔・
strMessage = constants.getString("Logistics_ERROR_011");
bufXML.append(getSystemXML(strMessage, 1));
return bufXML.toString();

}
catch( java.lang.Exception e){    //ﾆ萢淼xception
strMessage = e.toString();
strMessage = getSystemXML(strMessage, 1);
return strMessage;
} }
}
晕了：（，老兄，把注释去掉吧：），怎么贴出来全是乱？你用的什么开发工具？JBiulder？