Jfinal不能使用别名，p6spy监控数据库日志

Jfinal不能使用别名，p6spy监控数据库日志

问题原因：JFinal中根据索引查询列名。
1、重新新建DB类：
package com.microcorecn.jfinalex;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

import com.jfinal.plugin.activerecord.ActiveRecordException;

import com.jfinal.plugin.activerecord.DbKit;

public class DbEx {

static <T> List<T> query(Connection conn, String sql, Object... paras) throws SQLException {

List result = new ArrayList();

PreparedStatement pst = conn.prepareStatement(sql);

for (int i=0; i<paras.length; i++) {

pst.setObject(i + 1, paras[i]);

}

// for (int i=0; i<paras.length; i++) {

// pst.setObject(i + 1, paras[i]);

// }

ResultSet rs = pst.executeQuery();

int colAmount = rs.getMetaData().getColumnCount();

String[] cols = new String[colAmount];

for(int i = 0; i < colAmount; ++i)

{

cols[i] = rs.getMetaData().getColumnLabel(i + 1);

}

if (colAmount > 1) {

while (rs.next()) {

Object[] temp = new Object[colAmount];

for (int i=0; i<colAmount; i++) {

temp[i] = rs.getObject(cols[i]);

}

result.add(temp);

}

}

else if(colAmount == 1) {

while (rs.next()) {

result.add(rs.getObject(cols[0]));

}

}

if (rs != null) {try {rs.close();} catch (SQLException e) {}}

if (pst != null) {try {pst.close();} catch (SQLException e) {}}

return result;

}

public static <T> List<T> query(String sql, Object... paras) {

Connection conn = null;

try {

conn = DbKit.getConnection();

return query(conn, sql, paras);

} catch (Exception e) {

throw new ActiveRecordException(e);

} finally {

DbKit.close(conn);

}

}

}

2、查询信息：

List<Object[]>  newAlbum=DbEx.query(sb.toString(), singerItem.get("id"));

if (newAlbum!= null) {

for(Object[] obj:newAlbum){

item.setBfpSingerId(obj[0]==null?"":obj[1].toString());

item.setSingerName(obj[1]==null?"":obj[1].toString());

item.setImgUrl(obj[2]==null?"":obj[2].toString());

item.setBfpAlbumId(obj[3]==null?"":obj[3].toString());

item.setNewAlbumName(obj[4]==null?"":obj[4].toString());

}

}