REST控制器中的Spring Boot绑定和验证错误处理

当我有以下模型与JSR-303(验证框架)注释:

public enum Gender {
    MALE, FEMALE
}

public class Profile {
    private Gender gender;

    @NotNull
    private String name;

    ...
}

以及以下JSON数据:

{ "gender":"INVALID_INPUT" }

在我的REST控制器中,我想处理绑定错误(gender属性的无效枚举值)和验证错误(name属性不能为null).

以下控制器方法不起作用:

@RequestMapping(method = RequestMethod.POST)
public Profile insert(@Validated @RequestBody Profile profile, BindingResult result) {
    ...
}

这会com.fasterxml.jackson.databind.exc.InvalidFormatException在绑定或验证发生之前产生序列化错误.

经过一番摆弄后,我想出了这个自定义代码,它可以满足我的需求:

@RequestMapping(method = RequestMethod.POST)
public Profile insert(@RequestBody Map values) throws BindException {

    Profile profile = new Profile();

    DataBinder binder = new DataBinder(profile);
    binder.bind(new MutablePropertyValues(values));

    // validator is instance of LocalValidatorFactoryBean class
    binder.setValidator(validator);
    binder.validate();

    // throws BindException if there are binding/validation
    // errors, exception is handled using @ControllerAdvice.
    binder.close(); 

    // No binding/validation errors, profile is populated 
    // with request values.

    ...
}

基本上这个代码的作用是序列化为通用映射而不是模型,然后使用自定义代码绑定到模型并检查错误.

我有以下问题:

自定义代码是这样的,或者在Spring Boot中有更标准的方法吗？

@Validated注释如何工作？如何创建自己的自定义注释,@Validated以便封装我的自定义绑定代码？

al_mukthar.. 6

这是我在一个项目中用于在春季启动时验证REST api的代码，这与您的要求不同，但是相同。

@RequestMapping(value = "/person/{id}",method = RequestMethod.PUT)
@ResponseBody
public Object updatePerson(@PathVariable Long id,@Valid Person p,BindingResult bindingResult){
    if (bindingResult.hasErrors()) {
        List errors = bindingResult.getFieldErrors();
        List message = new ArrayList<>();
        error.setCode(-2);
        for (FieldError e : errors){
            message.add("@" + e.getField().toUpperCase() + ":" + e.getDefaultMessage());
        }
        error.setMessage("Update Failed");
        error.setCause(message.toString());
        return error;
    }
    else
    {
        Person person = personRepository.findOne(id);
        person = p;
        personRepository.save(person);
        success.setMessage("Updated Successfully");
        success.setCode(2);
        return success;
    }

成功.java

public class Success {
int code;
String message;

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}
}

错误.java

public class Error {
int code;
String message;
String cause;

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getCause() {
    return cause;
}

public void setCause(String cause) {
    this.cause = cause;
}

}

您也可以在这里看看：Spring REST Validation

这是我在一个项目中用于在春季启动时验证REST api的代码，这与您的要求不同，但是相同。

@RequestMapping(value = "/person/{id}",method = RequestMethod.PUT)
@ResponseBody
public Object updatePerson(@PathVariable Long id,@Valid Person p,BindingResult bindingResult){
    if (bindingResult.hasErrors()) {
        List errors = bindingResult.getFieldErrors();
        List message = new ArrayList<>();
        error.setCode(-2);
        for (FieldError e : errors){
            message.add("@" + e.getField().toUpperCase() + ":" + e.getDefaultMessage());
        }
        error.setMessage("Update Failed");
        error.setCause(message.toString());
        return error;
    }
    else
    {
        Person person = personRepository.findOne(id);
        person = p;
        personRepository.save(person);
        success.setMessage("Updated Successfully");
        success.setCode(2);
        return success;
    }

成功.java

public class Success {
int code;
String message;

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}
}

错误.java

public class Error {
int code;
String message;
String cause;

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getCause() {
    return cause;
}

public void setCause(String cause) {
    this.cause = cause;
}

}

您也可以在这里看看：Spring REST Validation