一个整合ssm框架的实例

package com.jxy.java.web; import java.io.IOException; import java.io.PrintWriter; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import com.alibaba.fastjson.JSONObject; import com.jxy.java.vo.Kitty; // 告诉spring mvc这是一个控制器类 @Controller @RequestMapping("helloController") public class HelloWorldController { /** * 请求路径= 域名 + 项目名 + 类路径 + 方法路径 * 如： http://localhost:8080/jxy/helloController/sayhello * http://localhost:8080(域名) + /jxy(项目名) + /helloController(类路径) +　/sayhello(方法路径) */ // 对应请求路劲 @RequestMapping("sayhello") public void sayHello(HttpServletResponse response){ try { // 获取输出流 PrintWriter out = response.getWriter(); // 打印hello world! out.write("Hello World!"); // 发送信息 out.flush(); } catch (IOException e) { e.printStackTrace(); } } /** * 转发jsp页面,方法0：使用原始的request进行转发 * * @return */ @RequestMapping("sayHelloJsp0") public String sayHelloJsp0(HttpServletRequest request,HttpServletResponse response){ try { request.setAttribute("hello", "world0"); request.getRequestDispatcher("/WEB-INF/jsp/say_hello.jsp").forward(request, response); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }; return ""; } /** * 转发jsp页面,方法一:使用返回值为String * */ @RequestMapping("sayHelloJsp1") public String sayHelloJsp1(HttpServletRequest request,HttpServletResponse response){ request.setAttribute("hello", "world1"); // 返回jsp文件名,jsp路径=配置文件中的prefix + jsp文件名 + 配置文件的suffix return "say_hello"; } /** * 转发jsp页面,方法一:使用返回值为String,同时使用model封装类 * model封装了HttpserlvetRequest、HttpServletResponse */ @RequestMapping("sayHelloJsp1_1") public String sayHelloJsp1_1(HttpServletRequest request,HttpServletResponse response,Model model){ request.setAttribute("kitty", "kitty is a cat."); model.addAttribute("hello", "world1_1"); // 返回jsp文件名 return "say_hello"; } /** * 转发jsp页面,方法一:使用返回值为String,同时使用model封装类 * model替代者modelMap,功能同model */ @RequestMapping("sayHelloJsp1_2") public String sayHelloJsp1_1(HttpServletRequest request,HttpServletResponse response,ModelMap modelMap){ request.setAttribute("kitty", "kitty is a cat2."); modelMap.addAttribute("hello", "world1_2"); // 返回jsp文件名 return "say_hello"; } /** * 转发jsp页面,方法一:使用返回值为String,同时使用model封装类 * model替代者map,功能同model * 但是不推荐用，语义不明确 */ @RequestMapping("sayHelloJsp1_3") public String sayHelloJsp1_1(HttpServletRequest request,HttpServletResponse response,Map map){ request.setAttribute("kitty", "kitty is a cat3."); map.put("hello", "world1_4"); // 返回jsp文件名 return "say_hello"; } /** * 转发jsp页面,方法二:使用返回值为ModelAndValue * 创建模型视图对象modelAndView,将转发的jsp路径和转发参数放入modelAndView,返回modelAndView对象 * */ @RequestMapping("sayHelloJsp1_4") public ModelAndView sayHelloJsp1_4(HttpServletRequest request,HttpServletResponse response){ ModelAndView mav = new ModelAndView(); // 放入转发参数 mav.addObject("hello", "sayHelloJsp1_4"); mav.addObject("kitty", "kitty is a cat4."); // 放入jsp路径 mav.setViewName("say_hello"); return mav; } /** * 重定向:方法0。使用原始的response进行转发 */ @RequestMapping("sayHelloJsp2_0") public void sayHelloJsp2_0(HttpServletRequest request,HttpServletResponse response){ String url = "http://www.baidu.com"; try { response.sendRedirect(url); } catch (IOException e) { e.printStackTrace(); } } /** * 重定向:方法1。使用返回String，使用关键字redirect: */ @RequestMapping("sayHelloJsp2_1") public String sayHelloJsp2_1(HttpServletRequest request,HttpServletResponse response){ String url = "http://www.baidu.com"; return "redirect:"+url; } /** * 转发到表单页面 */ @RequestMapping("toHelloForm") public String toHelloForm(){ return "hello_form"; } /** * GET请求示例 * */ @RequestMapping(value="toHelloWorldJsp", method=RequestMethod.GET) public String toHelloWorldJspGet(Model model,String msg){ model.addAttribute("hello", msg); return "say_hello"; } /** * post请求 * */ @RequestMapping(value="toHelloWorldJsp", method=RequestMethod.POST) public String toHelloWorldJspPost(Model model,String msg){ model.addAttribute("hello", msg); return "say_hello"; } /** * 返回json格式的数据：通过输出流的方式 */ @RequestMapping(value="getHelloJson0", method=RequestMethod.GET) public void getHelloJsp0(HttpServletResponse response,String msg){ // 创建对象 Kitty kitty = new Kitty(); kitty.setName("kitty"); kitty.setSex(1); kitty.setMsg(msg); // 将对象转换成json字符串 String jsonString = JSONObject.toJSONString(kitty); // 获取输出流，并输出 try { PrintWriter out = response.getWriter(); out.write(jsonString); } catch (IOException e) { e.printStackTrace(); } } /** * 返回json格式的数据：通过输出流的方式 */ @RequestMapping(value="getHelloString", method=RequestMethod.GET) @ResponseBody public String getHelloString(String msg){ return msg; } /** * 返回json格式的数据：通过@ResponseBoy方式,示例一 */ @RequestMapping(value="getHelloJson", method=RequestMethod.GET) @ResponseBody public Map<String,String> getHelloJsp(String msg){ Map<String,String> result = new HashMap<>(); result.put("msg", msg); return result; } /** * 返回json格式的数据：通过@ResponseBoy方式,示例二 */ @RequestMapping(value="getHelloJson2", method=RequestMethod.GET) @ResponseBody public Kitty getHelloJsp2(String msg){ Kitty kitty = new Kitty(); kitty.setName("kitty"); kitty.setSex(1); kitty.setMsg(msg); return kitty; } }