spring boot 增删改查 上传 登陆的代码。

package com.example.springdemo.controller; import com.example.springdemo.dto.UserInfo; import com.example.springdemo.entity.User; import com.example.springdemo.service.UserService; import com.sun.xml.internal.bind.v2.model.core.ID; import org.apache.commons.validator.Msg; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Pageable; import org.springframework.data.domain.Sort; import org.springframework.data.repository.query.Param; import org.springframework.data.web.PageableDefault; import org.springframework.http.HttpStatus; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Iterator; import java.util.List; @RestController @RequestMapping("/api") public class UserController { @Autowired UserService userService; private final Logger logger = LoggerFactory.getLogger(getClass()); //查找 @GetMapping(value = "/users") @ResponseBody public List<User> getAllUser() { return userService.findAll(); } //增加 @PostMapping(value = "/Adduser") @ResponseBody public void add(@RequestParam("id") Integer id,@RequestParam("name") String name,@RequestParam("age") Integer age){ User user=new User(); user.setId(id); user.setName(name); user.setAge(age); userService.sava(user); } //删除 @DeleteMapping(value = "/delete/{id}") @ResponseBody public void delete(@PathVariable String id){ User user = new User(); user.setId(Integer.parseInt(id)); userService.delete(user);//这里有问题** } @GetMapping("/getone/{id}") @ResponseBody public User getone(@PathVariable Integer id){ //User user=new User(); // user.setId(Integer.parseInt(id)); // user.setAge("age"); // user.setName(name); return userService.getOne(id);//为什么不出现findOne } @PutMapping("/update/{id}") @ResponseBody public void update(@PathVariable("id") Integer id, @RequestParam("name") String name, @RequestParam("age") Integer age){ User user=new User(); user.setId(id); user.setAge(age); user.setName(name); userService.sava(user);//存在问题 } @PutMapping("/update1") public void update1(@RequestBody User user){ // UserInfo userInfo1=new UserInfo(); // userInfo1.setId(id); // userInfo1.setUsername(username); // userInfo1.setUserage(userage); userService.sava(user);//存在问题 } //模糊查询 @GetMapping("/findByNameLike/{name}") public List<User> findByNameLike(@PathVariable(value = "name") String name){ // 一定要加 "%"+参数名+"%" return userService.findByNameLike(name); } //多条件查询 @GetMapping("/findByNameAndAge/{name}") public List<User> findByNameAndAge(@PathVariable(value = "name") String name, @RequestParam("age") Integer age){ return userService.findByNameAndAge(name, age); } //分页查询 @GetMapping("/pageable") public Page<User> getEntryByPageable(@PageableDefault(value = 5, sort = { "id" }, direction = Sort.Direction.DESC) Pageable pageable) { return userService.findAll(pageable); } @RequestMapping("/") public ModelAndView index(){ ModelAndView mv = new ModelAndView("login"); return mv; } @PostMapping("/login") public ModelAndView Login(@RequestParam("username") String username, @RequestParam("userpassword") String userpassword){ System.out.println(username+":"+userpassword); List<User> users= userService.findByNameAndAge(username,Integer.parseInt(userpassword)); // for (Login l:loginService.findAll()) { // System.out.println(l.getUsername()+":"+l.getUserpassword()); // } ModelAndView success = new ModelAndView(); if(users.size()>0) success.setViewName("success"); else success.setViewName("404"); return success; } }