如何動態的獲取資料庫裡面的欄位以…
private String getResult(String sql){
Connection conn=null;
ResultSet rs=null;
conn=
DBConnection.getConnection(Constants.DATABASE_PATH_STYLE);
PreparedStatement selectPS =
conn.prepareStatement(sql);
try {
rs =
selectPS.executeQuery();
} catch (SQLException e1)
{
// TODO
Auto-generated catch block
e1.printStackTrace();
}
ArrayList lstThemes=new
ArrayList();
try {
if(rs!=null){
int
colCount=rs.getMetaData().getColumnCount();
while(rs.next()){
HashMap
hm=new HashMap();
for(int
i=1;i<=rs.getMetaData().getColumnCount();i++){
String
colName=rs.getMetaData().getColumnName(i);
if("getValidColumnIndex".equals(colName))
{
continue;
}
hm.put(colName,rs.getString(colName));
}
lstThemes.add(hm);
}
}
} catch (SQLException e)
{
// TODO
Auto-generated catch block
e.printStackTrace();
}finally{
DBConnection.closeConnection(conn);
}
JSONArray json =
JSONArray.fromObject(lstThemes);
return json.toString();
}