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
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<action name="test" class="com.action.TestAction">
<result name="success" type="freemarker">/test.flt</result>
</action>
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TestAction.java代码如下
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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;
}
}
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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;
}
}
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test.flt代码如下
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<#list lis as x>
${x.username},
${x.password}<br>
</#list> //freemarker用法网上有相关介绍
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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