import java.util.ArrayList;import java.util.Collection;import java.util.Iterator;import java.util.List; import net.sf.json.JSONArray;import net.sf.json.JSONObject; public class MainClass { public static void main(String[] args) { TestJsonBean(); Test
resultset 对象获取行字段数据时报:java.sql.SQLException: Column 'id' not found. 代码: String sql="SELECT d.content,c.name AS categoryName FROM news_detail d,news_category c WHERE d.categoryId=c.id"; Object[] params ={}; System.out.println(this.executeQuery(sq