save.java

重点不是信息管理系统

package com.yijia_ctgu.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.simple.JSONObject;
import com.yijia_ctgu.DB.*;
import com.yijia_ctgu.exception.*;
/**
 * 
 * @author yijia
 *
 */
public class Save extends HttpServlet {
	public Save() {
		super();
	}
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
	}
	/**
	 * tableName这个参数尤其要注意，不要把它放到property数组中。
	 */
	public void doPost(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
        res.setCharacterEncoding("utf-8");
		res.setContentType("text/html");
		PrintWriter out = res.getWriter();
		String tableName=req.getParameter("tableName");
		String id=req.getParameter("id");
		//System.out.println(id);
		Enumeration enu=req.getParameterNames();
		JSONObject obj=new JSONObject();
	    ArrayList list=new ArrayList();
	    while(enu.hasMoreElements()){
	    	String propertyName=(String)enu.nextElement();
	    	String propertyValue=(String)req.getParameter(propertyName);
	    	String temp[]=new String[2];
	    	if(!("".equals(propertyValue)||propertyValue==null||propertyName.equals("tableName"))){
	    		temp[0]=propertyName;
	    		temp[1]=propertyValue;
	    		list.add(temp);
	    	}
	    }
	    Object[] propertyObjec=list.toArray();
	    String[][] property=new String[propertyObjec.length][];
	    for(int j=0;j<propertyObjec.length;j++){
	    	property[j]=(String[])propertyObjec[j];
	    	//System.out.println(property[j][0]+property[j][1]);
	    }
		try {
			DB.getTable(tableName).insert(id,property);
			obj.put("success", true);
		} catch (SQLException e) {
			obj.put("errors", "数据库错误");
		} catch (AlreadyExistException e) {
			obj.put("errors", "记录已存在");
		} catch (NotQueryException e) {
			System.out.println("不可能的事发生了");
		}
	out.println(obj);
	}
	public void init() throws ServletException {
		// Put your code here
	}

}