JDBC查询指定条件的数据

package qddx.JDBC;
import java.sql.*;
public class QueryById {

public bbsVo QuerybbsVoById(int id){
bbsVo vo = null;
Connection conn = null;
PreparedStatement pst = null;
ResultSet rs = null;
try{
conn = JDBC_Connection.getConnection();
pst = conn.prepareStatement("select * from article where id=?");
pst.setInt(1, id);//设置条件id
rs=pst.executeQuery();
while(rs.next()){//结果集存在则进行遍历
vo = new bbsVo();
vo.setId(rs.getInt("id"));
vo.setPid(rs.getInt("pid"));
vo.setRootid(rs.getInt("rootid"));
vo.setCont(rs.getString("cont"));
vo.setPdate(rs.getTimestamp("pdate"));
vo.setIsleaf(rs.getInt("isleaf"));
vo.setTitle(rs.getString("title"));

}
}catch(SQLException e){
e.printStackTrace();
}finally{
JDBC_Connection.free(rs, conn, pst);
}
return vo;

}
public static void main(String[] args) {
// TODO Auto-generated method stub
QueryById byid = new QueryById();
int id = 3;
bbsVo vo = byid.QuerybbsVoById(id);
if(vo!=null){
System.out.print("id\t");

4000
System.out.print("pid\t");
System.out.print("rootid\t");
System.out.print("title\t\t");
System.out.print("cont\t");
System.out.print("pdate\t");
System.out.print("isleaf\t");
System.out.println();
System.out.print(vo.getId()+"\t");
System.out.print(vo.getPid()+"\t");
System.out.print(vo.getRootid()+"\t");
System.out.print(vo.getTitle()+"\t");
System.out.print(vo.getCont()+"\t");
System.out.print(vo.getPdate()+"\t");
System.out.print(vo.getIsleaf()+"\t");
}else{
System.out.println("id为"+id+" 的用户不存在");
}
}

}