public static List queryList(String preSql, String className,

Connection con, int offset, int pagelength) throws PortalException

{

List beanbasket = new ArrayList();

String[] columns = null;

if (con == null)

{

con = getConnection();

}

//查询出的结果集

ResultSet rs = null;

PreparedStatement pstmt = null;

try

{

pstmt = con.prepareStatement(preSql);

if (pagelength != 0)

{

int endnum = offset+pagelength;

int stratnum = offset+1;

pstmt.setInt(1, endnum);

pstmt.setInt(2, stratnum);

}

LogFactory.debug("will query the data!!");

rs = pstmt.executeQuery();

LogFactory.debug("query the data success!!!");

ResultSetMetaData metedata = rs.getMetaData();

//获取查询出的字段总数

int i = metedata.getColumnCount();

//获取数据库表中所有的字段名

columns = new String[i];

for (int j = 1; j < i+1; j++)

{

columns[j-1] = metedata.getColumnName(j);

}

Class clazz = Class.forName(className);

Field[] fields = clazz.getDeclaredFields();

LogFactory.debug("the fields length is:"

+ fields.length);

while (rs.next())

{

Object obj = clazz.newInstance();

for (Field f : fields)

{

//如果该字段在数据库中有存储

if(isContainField(f.getName(),columns)){

f.setAccessible(true);

String strType = f.getType().toString();

if (strType.indexOf("Long") != -1)

{

f.set(obj, rs.getLong(f.getName()));

}

else if (strType.indexOf("Integer") != -1

|| strType.indexOf("int") != -1)

{

f.set(obj, rs.getInt(f.getName()));

}

else if (strType.indexOf("String") != -1)

{

String s = rs.getString(f.getName());

if(s!=null&&!s.equals("null"))

{

s =s.trim();

}

else

{

s = "";

}

f.set(obj, s);

}

else if (strType.indexOf("Date") != -1)

{

f.set(obj, rs.getDate(f.getName()));

}

else if (strType.indexOf("Double") != -1)

{

f.set(obj, rs.getDouble(f.getName()));

}

else if (strType.indexOf("Float") != -1)

{

f.set(obj, rs.getFloat(f.getName()));

}

else

{

LogFactory.debug(

"this data type not support yet!");

LogFactory.debug("this date type is"

+ f.getName());

}

}

beanbasket.add(obj);

}

}

catch (Exception ex)

{

}

LogFactory.info("Exit DBProxy.querylist()");

return beanbasket;

}

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2011-10-27 21:28

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