spring @Valid注解式验证

朴灿烈づ我的快乐病毒、 2022-04-23 10:52 240阅读 0赞

1.maven

<dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-validator</artifactId>
                <version>4.3.0.Final</version>
            </dependency>

2.建立实体类

import javax.validation.Valid;
    import javax.validation.constraints.Min;
    import javax.validation.constraints.NotBlank;
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.NotNull;
    import java.util.List;
    
    /**
     * @Author: 
     * @Date: 2019/2/8 23:12
     */
    public class Person {
    
        @NotBlank(message = "id不能为空")
        private String id;
    
        @NotBlank(message = "名字不能为空")
        private String name;
    
        @Min(value = 18,message = "年龄必须大于或等于18")
        private int age;
    
        @Valid
        @NotEmpty(message = "list不能为空")
        private List list;
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public List getList() {
            return list;
        }
    
        public void setList(List list) {
            this.list = list;
        }
    
        public String getId() {
            return id;
        }
    
        public void setId(String id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        @Override
        public String toString() {
            return "Person{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    ", age=" + age +
                    ", list=" + list +
                    '}';
        }
    }

注解：[https://blog.csdn.net/u012102104/article/details/78956639][https_blog.csdn.net_u012102104_article_details_78956639]

3.控制类

@RestController
    public class TestController {
    
        @RequestMapping(value = "/a",method = RequestMethod.POST)
        public String a(@Valid  @RequestBody Person person,BindingResult bindingResult) {
            if(bindingResult.hasErrors()){
                System.out.println(bindingResult.getFieldError().getDefaultMessage());
                return null;
            }
            System.out.println(person.toString());
            return "123";
        }
    }

有一些是统一处理报错，这里是通过BindindResult输出错误信息

[https_blog.csdn.net_u012102104_article_details_78956639]: https://blog.csdn.net/u012102104/article/details/78956639