可以通过Class的name属性来查看数据类型，每一个对象都有一个Class，在java中一切皆对象，故能够通过如下方式来获取对象的类型：
Date date = new Date()System.out.println(date.getClass().getName()) //java.util.Date
public ParameterList getFieldList(String tableName)throws SQLException{ResultSet rs = executeQuery("SELECT * FROM " + tableName)
ResultSetMetaData meta = rs.getMetaData()
int columnCount = meta.getColumnCount()
ParameterList result = new ParameterList()
for (int i = 0i <columnCounti++)
{
DBTableFieldStruct field = new DBTableFieldStruct()
int cursor = i + 1
field.type = meta.getColumnType(cursor)
result.append(field)
}
return result
}
