SpringBoot用户CRUD

SpringBoot用户CRUD

1.准备

这里地址去直接生成你需要的项目信息，如何你本身ide以及集成了springboot 那么可以直接生成项目信息

需要的知识：java，spring，springmvc，thymelafe

2开始

根据图片项目结构信息可以推断，我们需要写下面几个类：

1 package com.dgw.boot.dgw.domain; 2 3 /** 4 * @author DGW-PC 5 * @data 2018年7月17日 6 */ 7 public class User{ 8 9 private Long id;10 private String name;11 private String email;12 13 public User() {14 15 }16 17 public User(Long id, String name, String email) {18 this.id = id;19 this.name = name;20 this.email = email;21 }22 23 @Override24 public String toString() {25 return "User [id=" + id + ", name=" + name + ", email=" + email + "]";26 }27 28 public Long getId() {29 return id;30 }31 32 public void setId(Long id) {33 this.id = id;34 }35 36 public String getName() {37 return name;38 }39 40 public void setName(String name) {41 this.name = name;42 }43 44 public String getEmail() {45 return email;46 }47 48 public void setEmail(String email) {49 this.email = email;50 }51

Dao beans

public interface UserRepository { User savaOrUpdateUser(User user); void deleteUser(long id); User getUserById(long id); List listUsre(); }@Repositorypublic class UserRepositoryImpl implements UserRepository { private static AtomicLong count=new AtomicLong(); private ConcurrentMap useMap=new ConcurrentHashMap<>(); @Override public User savaOrUpdateUser(User user) { Long id = user.getId(); if(id==null) { id=count.incrementAndGet(); user.setId(id); } this.useMap.put(id, user); return user; } @Override public void deleteUser(long id) { this.useMap.remove(id); } @Override public User getUserById(long id) { return this.useMap.get(id); } @Override public List listUsre() { return new ArrayList<>(this.useMap.values()); }}

控制器：

1 /** 2 * 从 用户存储库 获取用户列表 3 * @return 4 */ 5 private List getUserlist() { 6 return userRepository.listUser(); 7 } 8 9 /**10 * 查询所用用户11 * @return12 */13 @GetMapping14 public ModelAndView list(Model model) {15 model.addAttribute("userList", getUserlist());16 model.addAttribute("title", "用户管理");17 return new ModelAndView("users/list", "userModel", model);18 }19 20 /**21 * 根据id查询用户22 * @param message23 * @return24 */25 @GetMapping("{id}")26 public ModelAndView view(@PathVariable("id") Long id, Model model) {27 User user = userRepository.getUserById(id);28 model.addAttribute("user", user);29 model.addAttribute("title", "查看用户");30 return new ModelAndView("users/view", "userModel", model);31 }32 33 /**34 * 获取 form 表单页面35 * @param user36 * @return37 */38 @GetMapping("/form")39 public ModelAndView createForm(Model model) {40 model.addAttribute("user", new User());41 model.addAttribute("title", "创建用户");42 return new ModelAndView("users/form", "userModel", model);43 }44 45 /**46 * 新建用户47 * @param user48 * @param result49 * @param redirect50 * @return51 */52 @PostMapping53 public ModelAndView create(User user) {54 user = userRepository.saveOrUpateUser(user);55 return new ModelAndView("redirect:/users");56 }57 58 /**59 * 删除用户60 * @param id61 * @return62 */63 @GetMapping(value = "delete/{id}")64 public ModelAndView delete(@PathVariable("id") Long id, Model model) {65 userRepository.deleteUser(id);66 67 model.addAttribute("userList", getUserlist());68 model.addAttribute("title", "删除用户");69 return new ModelAndView("users/list", "userModel", model);70 }71 72 /**73 * 修改用户74 * @param user75 * @return76 */77 @GetMapping(value = "modify/{id}")78 public ModelAndView modifyForm(@PathVariable("id") Long id, Model model) {79 User user = userRepository.getUserById(id);80 81 model.addAttribute("user", user);82 model.addAttribute("title", "修改用户");83 return new ModelAndView("users/form", "userModel", model);84

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