SpringMVC返回值的几种方式

以上为本人在写SpringMVC经常用到的几种方式，记录放在这里，备查。也希望能来到这里的人有用。

    
/*
 * This file is a spring controller return tester,so please do not delete this file
 * created by xiaohelong 20140904 
 * email:[email protected] 
 */
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

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

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.google.gson.JsonObject;

/**
 * this class just for example ,please read spring reference in detail.
 * 
 * just for controller use case demo by xiaohelong
 */
import dwz.business.info.News;
import dwz.business.info.NewsType;
import dwz.persistence.BaseConditionVO;
import dwz.web.BaseController;
@Controller
public class OttControlerTest extends BaseController{
	static Logger log = Logger.getLogger(
			OttControlerTest.class.getName());
	/**
	 * 
	 * @return Bean
	 */
	@RequestMapping("/Test")
	@ResponseBody
	public TestBean  test (){
	log.debug("Test function");
	TestBean testBean=new TestBean();
	testBean.setName("haha");
		return testBean;
	}	
	/**
	 * 
	 * @return Bean List
	 */
	@RequestMapping("/TestList")
	@ResponseBody
	public List  testList (){
	log.debug("TestList function");
	List testBeanList=new ArrayList();
	TestBean testBean1=new TestBean();
	testBean1.setName("haha");
	TestBean testBean2=new TestBean();
	testBean2.setName("hehe");
	testBeanList.add(testBean1);
	testBeanList.add(testBean2);
		return testBeanList;
	}	
	
	/**
	 * 
	 * @return JSON Data
	 */
	@RequestMapping("/TestJSONObject")	
	public void  testReturrnJSONWithoutBean(HttpServletRequest request,HttpServletResponse response) throws IOException{
		log.debug("TestJSONObject function");
	    response.setContentType("application/json");
	    response.setCharacterEncoding("UTF-8");
		PrintWriter writer=response.getWriter();
		JsonObject jsonObject=new JsonObject();
		jsonObject.addProperty("name","hehe jsonobject");
		writer.println(jsonObject.toString());
		writer.close();
		}
	
	/**
	 * 
	 * @return String
	 */	
	@RequestMapping("/TestReturnPage")
	@ResponseBody
	public String  testReturrnPage(){
		log.debug("TestReturnPage");
			return "/testpage";
		}	
	
	/**
	 * The difference between model and modelandview is just sematic
	 * */ 
	/**
	 * @return JSON ModelAndView
	 */
	@RequestMapping("/TestReturnModel")
	public String  testReturnModel(Model model){
		log.debug("testReturrnModel");
		model.addAttribute("testmodel", "hello model");
			return "testpage";
		}
	/**
	 * The difference between model and modelandview is just sematic
	 * */ 
	/**
	 * @return JSON ModelAndView
	 */
	@RequestMapping("/TestReturnModelAndView")
	public ModelAndView  testReturnModelAndView(){
		log.debug("testReturrnModel");
		ModelAndView mav = new ModelAndView("testpage");
		mav.addObject("testmodel", "hello test model");
			return mav;
		}	
}

  
/** 
     * 获取系统显示的菜单 
     *  
     * @param 无 
     * @return 返回JSON字符串，这是经过处理后的结构化树形数据。 
     */  
    @RequestMapping(value = "/getShowedMenus", produces = "application/json; charset=utf-8")  
    @ResponseBody  
    public String getShowedMenus() {          
        JsonArray menus=new JsonArray();  
        try{  
            menus=platformMenuService.getMenusForShow();  
        }catch(Exception e)  
        {  
            logger.error(e.toString());  
            e.printStackTrace();  
        }  
        return menus.toString();  
    } 
    /**
     * 从远程数据中心中注销登录
     * @param request
     * @param response
     * @return 返回逻辑值
     */
    @RequestMapping("/logout")
    @ResponseBody
    private boolean logout(HttpServletRequest request,HttpServletResponse response)
    {
     boolean retVal=false;
     try{
     
     }catch(Exception e){
      logger.error(e.toString());
     }
        return retVal;
    }
    /**
     * 本地数据中心登录至远程数据中心。
     * @param datacenterId
     * @return 返回是否登录成功
     */
    @RequestMapping(value="/login",produces = "application/json; charset=utf-8")
    @ResponseBody
    public Boolean login(String dcId,HttpServletRequest request,HttpServletResponse response) {
    	logger.info("datacenterId"+dcId);
    	dcId="12";
    	Boolean retVal=false;
    	try{
    	 DatacatalogDatacenter dc=datacenterService.selectByPrimaryKey(dcId);
String url="http://localhost:8080/"+request.getContextPath()+"/rest/datacatalog/datacenter/server/login?&no=121";
String val=HttpUtils.HttpPost(url);
    retVal=Boolean.parseBoolean(val);
//retObject=new JSONObject(detail);
    	}catch(Exception e){
    	 logger.error(e.toString());
    	 e.printStackTrace();
    	}
        return retVal;
    }