webwork2+FreeMarker 制作数据列表显示简单实例

 

刚刚接触了FreeMarker觉得不错

做了个小例子

首先建立个数据表里面有username,password两个字段自己随便加几条数据
建立一个webwork  action    TestAction.java
在xwork.xml里加入如下内容
----------------------------------------
     <action name="test" class="com.action.TestAction">
      <result name="success" type="freemarker">/test.flt</result>
    </action>
----------------------------------------
TestAction.java代码如下
--------------------------------------------------
package com.action;

import com.opensymphony.xwork.ActionSupport;
import java.util.*;
import com.ResultGather;

public class TestAction extends ActionSupport
{
 private List lis;
 private ResultGather rs;
 public List getLis()
 {
  return this.lis;
 }
 public String execute() throws Exception
 {
  rs = new ResultGather();
  lis = rs.selectRS("select * from userbasedatum");//数据结果我是用List,HashMap封装的,HashMap存的是单条记录
  return SUCCESS;
 }
}

-------------------------------------------------------------------------------------------------------------------
ResultGather.java代码如下
----------------------------------------------------------
package com;

import conn.DBConnManager;//数据库连接池
import java.sql.*;
import java.util.*;

public class ResultGather
{
 private String sql;
 public ResultGather()
 { 
 }
 public ResultGather(String sqlcom)
 {
  this.sql=sqlcom;
 }
 public List selectRS(String sqlStr)
 {
  this.sql = sqlStr;
  return selectRS();
 }
 public List selectRS() //数据结果在这里装入List和Map
 {
  List rsall = new ArrayList();
  DBConnManager conn = null;
  Connection  con = null;
  Statement stmt = null;
  ResultSet rs = null;
  Map rsTree;
  try{
   conn = DBConnManager.getInstance();
   con = conn.getConnection("mssql");
   stmt = con.createStatement();
   rs = stmt.executeQuery(sql);
   ResultSetMetaData rsmd = rs.getMetaData();
   int numberOfColumns = rsmd.getColumnCount();
   while(rs.next())
   {
   rsTree = new HashMap(numberOfColumns);
    for(int r=1;r<numberOfColumns+1;r++)
    {
     rsTree.put(rsmd.getColumnName(r),rs.getObject(r)); 
     
    }
    rsall.add(rsTree);
   }
   
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }finally{
   try{
    if(rs!=null)
     rs.close();
    if(stmt!=null)
     stmt.close();
    if(conn!=null)
     conn.releaseConnection("mssql",con);
   }catch(Exception e){
    System.out.println(e);
   } 
  }
  return rsall;
 }
 }
-----------------------------------------------------------------------------------------------
test.flt代码如下
-----------------------------------------------------------------------------------------
<#list lis as x>
${x.username},
${x.password}<br>
</#list>     //freemarker用法网上有相关介绍
-------------------------------------------------------------------------------------

OK 完成了 没有用到jsp<%.....%>和jsptag
用这个例子做一点修改就可以具有分页用能了