hibernate 用combobox+grid panel做动态组合查询，grid panel 不显示数据的问题

lyj57 2013-08-29 11:36:04

我主要使用extjs中的combobox+grid panel做动态组合查询，在web层可以通过下面的代码获取combobox控件的值并传到后台

package cn.edu.bnu.land.web;



import java.io.IOException;









import java.util.HashMap;

import java.util.List;

import java.util.Map;









import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;



import cn.edu.bnu.land.common.SpringContextHolder;

import cn.edu.bnu.land.model.Transinfo;

import cn.edu.bnu.land.model.TransinfoHome;

import cn.edu.bnu.land.service.TransinfoService;







@Controller

public class TransinfoController {

    private TransinfoService transinfoService;





    @Autowired

    public TransinfoController(TransinfoService transinfoService) {

        this.transinfoService = transinfoService;

    }

	@RequestMapping(value = "/find_transinfo") 

	@ResponseBody 	

	public List<Transinfo> handle(@RequestBody Transinfo transinfo) throws IOException 

	{ 

		

		

		System.out.println("web before"); 

		System.out.println(transinfo.getArea()+ transinfo.getAcre() + transinfo.getPrice());

		//this.transinfoService.findtransinfo(transinfo);

		List<Transinfo> myList= this.transinfoService.findtransinfo(transinfo);

		

		for(Transinfo mytransinfo:myList){

			System.out.println("List:"+mytransinfo.getLandid());

		}

		

        return  (myList);

		

	} 

}

在model层可以通过下面的代码实现查询，控制台也可以打印出结果，但是grid panel 里没有显示

public List<Transinfo> searchInfo(Transinfo transinfo){

		System.out.println("Home_before");

		//String outArea = "重庆";

		String outArea = transinfo.getArea();

		

		System.out.println(outArea);

		List<Transinfo> results = null;

		

		Session session = sessionFactory.getCurrentSession();

		DetachedCriteria dc = DetachedCriteria.forClass(Transinfo.class);

		//对区域进行判断查询

		if (outArea != null){

			dc.add(Restrictions.ilike("area", outArea,MatchMode.ANYWHERE));

		}

Criteria c = dc.getExecutableCriteria(session);

		results = c.list();

		for(Transinfo t:results){

    		System.out.println(t.getLandid());

		}	    

			



		return results;

		

	}

如果我将web层中的
public List<Transinfo> handle(@RequestBody Transinfo transinfo) throws IOException
修改为public List<Transinfo> handle(Transinfo transinfo) throws IOException 获取不到控件值（始终都为null），但是grid可以显示查询结果（这是因为transinfo.getArea=null，所以查询结果为数据库全部内容）。这是怎么回事？？我要怎么解决这个问题啊？

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