11月27日总结生成数据字典后端servlet层

servlet层：

package servlet;

import dao.tabledao;
import net.sf.json.JSONArray;
import org.json.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

@WebServlet("/sqlServlet")
public class sqlServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        String colname=(String)request.getSession().getAttribute("colname");
        PrintWriter out=response.getWriter();
        JSONObject jsonObject=new JSONObject();
        jsonObject.put("code",0);
        jsonObject.put("msg","");
        jsonObject.put("count",1);
        String sql="select * from col where table_name = '" + colname+"'  ";
        System.out.println(sql);
        JSONArray result=null;
        try{
            tabledao he=new tabledao();
            result = JSONArray.fromObject(he.collist(sql));
        }catch(SQLException ex)
        {
            ex.printStackTrace();
        }
        jsonObject.put("data",result);
        System.out.println(jsonObject.toString());
        out.println(jsonObject.toString());
        out.flush();
        out.close();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request,response);

    }
}