介绍
在项目的过程中，对于参数的校验是必须的，如果参数比较少的话我们可以直接通过代码进行校验，但是数据较大时再用这个方法就比较笨重了，接下来就该我们的主角Validation闪亮登场了
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
实际上在这里数据校验都是调用的javax.validation，spring-boot-starter-web中也包含了hibernate-validator，有兴趣的可以去翻翻文档
User.java
package com.priv.gabriel.entity;
import lombok.Data;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-23
* @Description:
*/
@Data
public class User {
@NotBlank(message = "name不允许为空")
@Length(min = 2,max = 10,message = "你的长度不对劲呀")
private String name;
@NotNull(message = "进入未成年人入内！")
@Min(18)
private int age;
@NotBlank(message = "拒绝黑户")
private String address;
}
接下来只需要在Controller层中使用@valid进行校验就可以了
package com.priv.gabriel.controller;
import com.priv.gabriel.entity.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.validation.Valid;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-23
* @Description:
*/
@RestController
@RequestMapping("/user")
public class UserController {
@RequestMapping("/check")
public String check(@Valid User user){
return "检测完毕！没有问题";
}
}
用Rest Client工具简单检测一下
image.png
结果当然是...
{
"timestamp": "2018-10-23T09:01:45.159+0000",
"status": 400,
"error": "Bad Request",
"errors": [{
"codes": ["Length.user.name", "Length.name", "Length.java.lang.String", "Length"],
"arguments": [{
"codes": ["user.name", "name"],
"arguments": null,
"defaultMessage": "name",
"code": "name"
}, 10, 2],
"defaultMessage": "你的长度不对劲呀",
"objectName": "user",
"field": "name",
"rejectedValue": "",
"bindingFailure": false,
"code": "Length"
}, {
"codes": ["Min.user.age", "Min.age", "Min.int", "Min"],
"arguments": [{
"codes": ["user.age", "age"],
"arguments": null,
"defaultMessage": "age",
"code": "age"
}, 18],
"defaultMessage": "最小不能小于18",
"objectName": "user",
"field": "age",
"rejectedValue": 17,
"bindingFailure": false,
"code": "Min"
}, {
"codes": ["NotBlank.user.address", "NotBlank.address", "NotBlank.java.lang.String", "NotBlank"],
"arguments": [{
"codes": ["user.address", "address"],
"arguments": null,
"defaultMessage": "address",
"code": "address"
}],
"defaultMessage": "拒绝黑户",
"objectName": "user",
"field": "address",
"rejectedValue": "",
"bindingFailure": false,
"code": "NotBlank"
}, {
"codes": ["NotBlank.user.name", "NotBlank.name", "NotBlank.java.lang.String", "NotBlank"],
"arguments": [{
"codes": ["user.name", "name"],
"arguments": null,
"defaultMessage": "name",
"code": "name"
}],
"defaultMessage": "name不允许为空",
"objectName": "user",
"field": "name",
"rejectedValue": "",
"bindingFailure": false,
"code": "NotBlank"
}],
"message": "Validation failed for object='user'. Error count: 4",
"path": "/user/check"
}
好了，到这里可以看到我们的设置已经生效了，关于数据校验你get到了吗？
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