Spring控制器响应(action)请求的几种处理方式,如返回JSON，MODEL MODELVIEW，STRING

Controller：package **.web.controller;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.http.HttpRequest;import org.apache.http.HttpResponse;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;import com.hunantv.ott.loganalysis.persistence.beans.TestBean;/** * 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;@Controllerpublic class OttControlerTest extends BaseController{static Logger log = Logger.getLogger(OttControlerTest.class.getName());@RequestMapping("/Test")@ResponseBodypublic TestBean  test (){log.debug("Test function");TestBean testBean=new TestBean();testBean.setName("haha");return testBean;}@RequestMapping("/TestList")@ResponseBodypublic List<TestBean>  testList (){log.debug("TestList function");List<TestBean> testBeanList=new ArrayList<TestBean>();TestBean testBean1=new TestBean();testBean1.setName("haha");TestBean testBean2=new TestBean();testBean2.setName("hehe");testBeanList.add(testBean1);testBeanList.add(testBean2);return testBeanList;}@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();}@RequestMapping("/TestReturnPage")@ResponseBodypublic String  testReturrnPage(){log.debug("TestReturnPage");return "/testpage";}/** * The difference between model and modelandview is just sematic * */ @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 * */ @RequestMapping("/TestReturnModelAndView")public ModelAndView  testReturnModelAndView(){log.debug("testReturrnModel");ModelAndView mav = new ModelAndView("testpage");mav.addObject("testmodel", "hello test model");return mav;}/*@RequestMapping("")public String list(BaseConditionVO vo, Model model) {List<News> newsList = newsMgr.searchNews(vo);int totalCount = newsMgr.searchNewsNum(vo);vo.setTotalCount(totalCount);model.addAttribute("newsTypes", NewsType.values());model.addAttribute("newsList", newsList);model.addAttribute("vo", vo);return "/management/news/list";}*/}Class TestBean:package **.persistence.beans;public class TestBean {public String getName() {return name;}public void setName(String name) {this.name = name;}String name;}