spring学习(一)

package com.itheima.controller;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.itheima.domain.User;
import com.itheima.domain.VO;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.List;

@Controller
public class UserController {

    @RequestMapping(value = "/quick23")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save23(String name, MultipartFile[] uploadFile) throws IOException {
        System.out.println(name);
//        System.out.println(uploadFile);
        for (MultipartFile multipartFile : uploadFile) {
            String originalFilename = multipartFile.getOriginalFilename();
            multipartFile.transferTo(new File("C:\\Users\\Lenovo\\Desktop"+originalFilename));
        }
    }

    @RequestMapping(value = "/quick22")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save22(String name, MultipartFile uploadFile,MultipartFile uploadFile2) throws IOException {
        System.out.println(name);
//        System.out.println(uploadFile);
        String originalFilename = uploadFile.getOriginalFilename();
        uploadFile.transferTo(new File("C:\\Users\\Lenovo\\Desktop"+originalFilename));
        String originalFilename2 = uploadFile.getOriginalFilename();
        uploadFile2.transferTo(new File("C:\\Users\\Lenovo\\Desktop"+originalFilename2));
    }

    @RequestMapping(value = "/quick21")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save21(@CookieValue("JSESSIONID") String jSessionId){
        System.out.println(jSessionId);
    }

    @RequestMapping(value = "/quick20")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save20(@RequestHeader(value = "User-Agent",required = false) String userAgent){
        System.out.println(userAgent);
    }

    @RequestMapping(value = "/quick19")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save19(HttpServletRequest request, HttpServletResponse response, HttpSession session){
        System.out.println(request);
        System.out.println(response);
        System.out.println(session);
    }

    @RequestMapping(value = "/quick18")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save18(Date date){
        System.out.println(date);
    }

    @RequestMapping(value = "/quick17/{name}")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save17(@PathVariable("name") String name){
        System.out.println(name);
    }

    @RequestMapping(value = "/quick16")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save16(@RequestParam(value = "username",required = false,defaultValue = "lele") String name){
        System.out.println(name);
    }

    @RequestMapping(value = "/quick14")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save14(@RequestBody List<User> userList){
        System.out.println(userList);
    }

    @RequestMapping(value = "/quick13")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save13(VO vo){
        System.out.println(vo);   //集合数据要进行POJO封装
    }

    @RequestMapping(value = "/quick12")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save12(User user){
        System.out.println(user);
    }

    @RequestMapping(value = "/quick11")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public void save11(String username,String addr){
        System.out.println(username);
        System.out.println(addr);
    }

    @RequestMapping(value = "/quick10")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public User save10(){
        User user = new User();
        user.setName("U");
        user.setAddr("org");
        return user;
    }

    @RequestMapping(value = "/quick9")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public String save9() throws JsonProcessingException {
        User user = new User();
        user.setName("K");
        user.setAddr("www");
        ObjectMapper objectMapper = new ObjectMapper();
        String json = objectMapper.writeValueAsString(user);

        return json;
    }

    @RequestMapping(value = "/quick8")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public String save8() {
        return "{\"username\":\"lele\",\"age\":18}";
    }

    @RequestMapping(value = "/quick7")
    @ResponseBody   //不进行页面跳转，直接进行数据响应
    public String save7() {
        return "hello mvc";
    }

    @RequestMapping(value = "/quick6")
    public void save6(HttpServletResponse response) throws IOException {
        response.getWriter().write("hello spring");
    }

    @RequestMapping(value = "/quick5")
    public String save5(HttpServletRequest request){
        request.setAttribute("username","itnice");
        return "success";
    }

    @RequestMapping(value = "/quick4")
    public String save4(Model model){
        model.addAttribute("username","itgood");
        return "success";
    }

    @RequestMapping(value = "/quick3")
    public ModelAndView save3(ModelAndView modelAndView){
        modelAndView.addObject("username","itheima");
        modelAndView.setViewName("success");
        return modelAndView;
    }

    @RequestMapping(value = "/quick2")
    public ModelAndView save2(){
        /*
            Model:封装数据
            View:展示数据
        */
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("username","itcast");
        modelAndView.setViewName("success");
        return modelAndView;
    }

    @RequestMapping(value = "/quick",method = RequestMethod.GET)
    public String save(){
        System.out.println("Controller save running...");
        //return 跳转的视图
        return "success";
    }
}