Java Spring MVC:更新现有实体
实体类Java Spring MVC:更新现有实体,java,spring,spring-mvc,jpa,Java,Spring,Spring Mvc,Jpa,实体类 @Entity public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id; @NotNull private String firstName; @NotNull private String lastName; @NotNull @Email private String em
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@NotNull
private String firstName;
@NotNull
private String lastName;
@NotNull
@Email
private String email;
private String country;
private String state;
private String roles;
private String permissions;
@NotNull
@Size(min=6)
private String password;
private String telNumber;
public User() {
}
public User(String firstName,String lastName,String email,String roles,String permissions,String password) {
this.firstName=firstName;
this.lastName=lastName;
this.email=email;
this.roles=roles;
this.permissions=permissions;
this.password=password;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country= country;
}
public String getState() {
return state;
}
public void setMesto(String state) {
this.state= state;
}
public String getRoles() {
return roles;
}
public List<String> getRolesList(){
if(this.roles.length()>0){
return Arrays.asList(this.roles.split(","));
}
return new ArrayList<>();
}
public List<String> getPermissionsLisst(){
if(this.permissions.length()>0){
return Arrays.asList(this.permissions.split(","));
}
return new ArrayList<>();
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public void setRoles(String roles) {
this.roles = roles;
}
public void setPermissions(String permissions) {
this.permissions = permissions;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getTelNumber() {
return telNumber;
}
public void setTelNumber(String telNumber) {
this.telNumber = telNumber;
}
}
您好,我正在寻找使用jpa存储库更新用户的方法。。
我尝试过很多方法,我在1/2的情况下通过互联网浏览,但收到的错误id不存在(就像这一种方法一样)
public User update(User user){
return userRepository.save(user);
}
),,
或者它不是在更新用户,而是在创建一个新的。。
我也在使用PasswordEncoder,当我想在password字段中打印用户密码时,它只是空的,是否可以在该字段中键入类似***的密码?
感谢您的帮助它正在创建新的,而不是更新,因为您没有从表单发送用户的
id
。存储库在幕后检查id是否存在,并使用id更新记录,否则将创建新记录
只需将id作为隐藏字段从视图中发送,它就会更新记录
<input type="hidden" th:field="${id}" />
您的代码有各种错误和误解: 将其更改为类似以下内容:
@Controller
public class UserController {
@Autowired
private UserServices userServices;
@GetMapping("/admin/userlist")
public String userList(Model model,@RequestParam(defaultValue = "") String email){
model.addAttribute("users",userServices.findByEmailLike(email));
return "/admin/userlist";
}
@GetMapping("/admin/useractions")
public String userActions(){
return "/admin/useractions";
}
@PostMapping("/admin/useractions")
public String updateUser(@ModelAttribute User user) {
userServices.update(user);
return "/theNextView";
}
@ModelAttribute("user")
public User getUser(@RequestParam(value = "id", required = false) Integer id) {
return id !=null ? userServices.findOne(id) : new User();
}
}
并在编辑表单中添加:
在GET和POST上,如果requestParamid
设置为URL参数或隐藏字段,则getUser(…)将使用现有用户填充模型
在后一种情况下,此现有用户将被传递给POST处理程序,提交的表单数据将绑定到此现有实例。将其放置在何处?目前,我将其设置为上限,并且我得到了此错误参数“id”不存在。我还想知道如何在密码字段中键入带有密码值的******?
<input type="hidden" th:field="${id}" />
@Controller
public class UserController {
@Autowired
private UserServices userServices;
@GetMapping("/admin/userlist")
public String userList(Model model,@RequestParam(defaultValue = "") String email){
model.addAttribute("users",userServices.findByEmailLike(email));
return "/admin/userlist";
}
@GetMapping("/admin/useractions")
public String userActions(){
return "/admin/useractions";
}
@PostMapping("/admin/useractions")
public String updateUser(@ModelAttribute User user) {
userServices.update(user);
return "/theNextView";
}
@ModelAttribute("user")
public User getUser(@RequestParam(value = "id", required = false) Integer id) {
return id !=null ? userServices.findOne(id) : new User();
}
}