/**
* 按主键查找一条数据
*
* @param saleArea 趸售区域
* @param voltageBegin 起始电压
* @return LwWholeSalePriceDto
* @throws Exception
*/
public LwWholeSalePriceDto findByPrimaryKey(String saleArea, double voltageBegin)
throws Exception {
StringBuffer buffer = new StringBuffer(200);
// 拼SQL语句
buffer.append("SELECT ");
buffer.append("PowerClass,");
buffer.append("SaleArea,");
buffer.append("VoltageBegin,");
buffer.append("VoltageEnd,");
buffer.append("Price,");
buffer.append("ValidStatus,");
buffer.append("Flag,");
buffer.append("Remark ");
buffer.append("FROM LwWholeSalePrice ");
if (logger.isDebugEnabled()) {
StringBuffer debugBuffer = new StringBuffer(buffer.length() * 4);
debugBuffer.append(buffer.toString());
debugBuffer.append("WHERE ");
debugBuffer.append("SaleArea=").append("'").append(saleArea).append("' AND ");
debugBuffer.append("VoltageBegin=").append("").append(voltageBegin).append("");
logger.debug(debugBuffer.toString());
}
buffer.append("WHERE ");
buffer.append("SaleArea = ? And ");
buffer.append("VoltageBegin = ?");
dbManager.prepareStatement(buffer.toString());
// 设置条件字段;
dbManager.setString(1, saleArea);
dbManager.setDouble(2, voltageBegin);
ResultSet resultSet = dbManager.executePreparedQuery();
LwWholeSalePriceDto lwWholeSalePriceDto = null;
if (resultSet.next()) {
lwWholeSalePriceDto = new LwWholeSalePriceDto();
lwWholeSalePriceDto.setPowerClass(dbManager.getString(resultSet, 1));
lwWholeSalePriceDto.setSaleArea(dbManager.getString(resultSet, 2));
lwWholeSalePriceDto.setVoltageBegin(dbManager.getDouble(resultSet, 3));
lwWholeSalePriceDto.setVoltageEnd(dbManager.getDouble(resultSet, 4));
lwWholeSalePriceDto.setPrice(dbManager.getDouble(resultSet, 5));
lwWholeSalePriceDto.setValidStatus(dbManager.getString(resultSet, 6));
lwWholeSalePriceDto.setFlag(dbManager.getString(resultSet, 7));
lwWholeSalePriceDto.setRemark(dbManager.getString(resultSet, 8));
}
resultSet.close();
return lwWholeSalePriceDto;
}
/**
* 按条件查询多条数据
*
* @param conditions 查询条件
* @param pageNo 页号
* @param rowsPerPage 每页的行数
* @return Collection
* @throws Exception
*/
public Collection findByConditions(String conditions, int pageNo, int rowsPerPage)
throws Exception {
StringBuffer buffer = new StringBuffer(200);
// 拼SQL语句
buffer.append("SELECT ");
buffer.append("PowerClass,");
buffer.append("SaleArea,");
buffer.append("VoltageBegin,");
buffer.append("VoltageEnd,");
buffer.append("Price,");
buffer.append("ValidStatus,");
buffer.append("Flag,");
buffer.append("Remark ");
buffer.append("FROM LwWholeSalePrice WHERE ");
buffer.append(conditions);
boolean supportPaging = false; // 数据库是否支持分页
if (pageNo > 0) {
// 对Oracle优化
if (dbManager
.getConnection()
.getMetaData()
.getDatabaseProductName()
.equalsIgnoreCase("Oracle")) {
buffer.insert(0, "SELECT * FROM ( SELECT row_.*, rownum rownum_ FROM (");
buffer.append(
") row_ WHERE rownum <= "
+ rowsPerPage * pageNo
+ ") WHERE rownum_ > "
+ rowsPerPage * (pageNo - 1));
supportPaging = true;
} else if (dbManager
.getConnection()
.getMetaData()
.getDatabaseProductName()
.equalsIgnoreCase("DB2")) {
String sql = buffer.toString();
buffer.setLength(0);
buffer.append("select * from ( select rownumber() over(");
int orderByIndex = sql.toLowerCase().indexOf("order by");
if (orderByIndex > 0) {
buffer.append(sql.substring(orderByIndex));
}
buffer.append(") as rownumber_,");
buffer.append(sql.substring(6));
buffer.append(" ) as temp_ where rownumber_");
buffer.append(
" between " + (rowsPerPage * (pageNo - 1) + 1) + " and " + rowsPerPage * pageNo);
supportPaging = true;
}
}
if (logger.isDebugEnabled()) {
logger.debug(buffer.toString());
}
ResultSet resultSet = dbManager.executeQuery(buffer.toString());
int count = 0;
if (supportPaging == false && pageNo > 1) {
dbManager.locate(resultSet, rowsPerPage * (pageNo - 1));
}
// 定义返回结果集合
Collection collection = new ArrayList(rowsPerPage);
LwWholeSalePriceDto lwWholeSalePriceDto = null;
while (resultSet.next()) {
if (supportPaging == false && pageNo > 0) {
count++;
if (count > rowsPerPage) {
break;
}
}
lwWholeSalePriceDto = new LwWholeSalePriceDto();
lwWholeSalePriceDto.setPowerClass(dbManager.getString(resultSet, "PowerClass"));
lwWholeSalePriceDto.setSaleArea(dbManager.getString(resultSet, "SaleArea"));
lwWholeSalePriceDto.setVoltageBegin(dbManager.getDouble(resultSet, "VoltageBegin"));
lwWholeSalePriceDto.setVoltageEnd(dbManager.getDouble(resultSet, "VoltageEnd"));
lwWholeSalePriceDto.setPrice(dbManager.getDouble(resultSet, "Price"));
lwWholeSalePriceDto.setValidStatus(dbManager.getString(resultSet, "ValidStatus"));
lwWholeSalePriceDto.setFlag(dbManager.getString(resultSet, "Flag"));
lwWholeSalePriceDto.setRemark(dbManager.getString(resultSet, "Remark"));
collection.add(lwWholeSalePriceDto);
}
resultSet.close();
return collection;
}