springMVC validator参数校验最新版

1.首先导包，这里需要导入两个jar 包，只导入一个会报错。

    <dependency>
      <groupId>org.hibernate.validator</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>6.1.5.Final</version>
    </dependency>

    <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>jakarta.el</artifactId>
      <version>3.0.3</version>
    </dependency>

2.新建实体类Student，在其中使用校验注解

public class Student implements Serializable{

    @NotEmpty(message = "用户名不可为空")
    String name;
    String address;
    @Email(message = "邮箱格式不真该")
    String email;
    @Max(100)@Min(1)
    int age;
    @Null
    String sex;
    @Min(value = 1,message = "不可是空")
    float score;
    @Size(message = "位不对",max = 11,min = 11)
    String phone;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public float getScore() {
        return score;
    }

    public void setScore(float score) {
        this.score = score;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", address='" + address + '\'' +
                ", email='" + email + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                ", score=" + score +
                ", phone='" + phone + '\'' +
                '}';
    }
}

3.新建controller测试，接收数据，其中@Valid注解表示对该对象启用校验，不可缺少。BindingResult是校验的结果，我们可以通过结果来判断给前端返回什么数据（如用户名为空，邮箱格式不对）

@Controller
public class TestController {

    @ResponseBody
    @RequestMapping("test")
    public String test(@Valid Student student, BindingResult result){
        List<ObjectError> errors = result.getAllErrors();
        for (ObjectError e : errors) {
            System.out.println(e.getDefaultMessage());
        }
        if (errors.size()==0){
            return "成功";
        }else {
            return "有格式不正确的参数";
        }
    }
}

4.网页测试文件也贴出来

<body>
<button id="b">button</button>
<script src="js/jquery-1.8.3.min.js"></script>
<script>
    $("#b").click(function () {

        $.ajax({
            url:"test",
            type:"post",
            data:{
                name:"张三",
                age:12,
                address:"天津",
                score:12.6,
                email:"hello@11.com",
                phone:"29438489349"
            },
            success:function (result) {
                window.alert(result)
            }
        })
    })
</script>
</body>

5.其他文件不需要需改，不需要修改配置文件等，以上就是全部，亲测无误。