为什么 bean class 无效属性 'district'

Question

运行 spring 引导项目时，主页出现错误 Invalid property 'district' of bean class。我知道为什么会出现此错误，因为 district 是子实体的属性，我可以从控制器中的 Home() 方法传递父实体。我可以在 Home() 方法中传递模型中的 Person 实体。但是 district 和 city 属性来自 Address 实体我正在使用 OneToOne 关系映射。

我的问题如下：

我们可以在 thymeleafth:object 中得到两个实体吗
我们可以使用 Model 从控制器将 Address 和 Person 实体一起发送到视图

堆栈跟踪：

Caused by: org.springframework.beans.NotReadablePropertyException: Invalid property 'district' of bean class [com.rest.RestApiPojo.Entity.Person]: Bean property 'district' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

下面是我的代码：

实体

@Entity
@Table(name = "person_master")
public class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long p_id;

    private String name;

    private String surname;

    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    private Address address;

    // getter setter
}

@Entity
@Table(name = "address_master")
public class Address {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long a_id;

    private String district;
    private String city;

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "address")
    @JoinColumn(name = "p_id")
    private Person person;

    // getter setter
}

服务

@Override
public Person addPersonAddress(Person person) {
    return personRepo.save(person);
}

控制器

@RequestMapping(value = "/", method = RequestMethod.GET)
public String Home(Model mdl)
{
    mdl.addAttribute("persons", new Person());
    return "register";
}
    
@RequestMapping(value = "/personaddress", method = RequestMethod.POST)
public String addPersonAddress(Model mdl, @ModelAttribute("person") Person person, HttpServletRequest req)
{
    Address address = person.getAddress();  // get reference of person from parent table and store in child table
        
    address.setDistrict(req.getParameter("district"));
    address.setCity(req.getParameter("city"));
        
    address.setPerson(person);
    pojoService.addPersonAddress(person);
    return "listofperson";
}

百里香叶

<form th:action="@{/personaddress}" th:object="${persons}" method="post">
        <div class="container">
        <h1 style="text-align: center">Add Person</h1>
          <div class="row">
            <div class="col-sm-12">
                <div class="mb-3">
                  <label for="exampleFormControlInput1" class="form-label">Person name</label>
                  <input type="text" class="form-control" name="name" th:field="*{name}">
                </div>
                <div class="mb-3">
                  <label for="exampleFormControlInput1" class="form-label">Person surname</label>
                  <input type="text" class="form-control" name="surname" th:field="*{surname}">
                </div>
                <div class="mb-3">
                  <label for="exampleFormControlInput1" class="form-label">District</label>
                  <input type="text" class="form-control" name="district" th:field="*{district}">
                </div>
                <div class="mb-3">
                  <label for="exampleFormControlInput1" class="form-label">City</label>
                  <input type="text" class="form-control" name="city" th:field="*{city}">
                </div>
                
                <input class="btn btn-primary" type="submit" value="Submit">
            </div>
          </div>
        </div>
    </form>

Answer 1

这是关于样板代码的。您可以将@Data 添加到来自 Lombok 库的 class。

如果您不使用 lombok 添加 setter 和 getter

public String getDistrict() {
   return district;
}

public void setDistrict(String district) {
   this.district= district;
}

Answer 2

不需要两个实体，因为它们已经映射到人身上 class 只需在 thymeleaf 中写入 'address.district' 和 'address.city'，你就会得到它

为什么 bean class 无效属性 'district'

Why got Invalid property 'district' of bean class

java

spring-mvc

thymeleaf

spring-boot

为什么 bean class 无效 属性 'district'

Why got Invalid property 'district' of bean class

java

spring-mvc

thymeleaf

spring-boot

为什么 bean class 无效属性 'district'