JSR303数据校验

Springboot中可以用@validated来校验数据，如果数据异常则会统一抛出异常，方便异常中心统一处理。我们这里来写个注解让我们的name只能支持Email格式；

新建个项目

pom.xml加入如下依赖

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

 DemoApplication.java

package com.zk.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

 Person.java

package com.zk.demo;

import org.hibernate.validator.constraints.Email;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import org.springframework.validation.annotation.Validated;

import java.util.List;

@Component
@Validated
@ConfigurationProperties(prefix = "person")
public class Person {
    //@Value("${person.last-name}")
    @Email
    private String lastName;
    private String Sno;
    private int grade;
    private List<Object> list;
    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getSno() {
        return Sno;
    }

    public void setSno(String sno) {
        Sno = sno;
    }

    public int getGrade() {
        return grade;
    }

    public void setGrade(int grade) {
        this.grade = grade;
    }

    public List<Object> getList() {
        return list;
    }

    public void setList(List<Object> list) {
        this.list = list;
    }

    @Override
    public String toString() {
        return "Person{" +
                "lastName='" + lastName + '\'' +
                ", Sno='" + Sno + '\'' +
                ", grade=" + grade +
                ", list=" + list +
                '}';
    }
}

　ZkController.java

package com.zk.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
public class ZkController {
    @Autowired
    private Environment environment;

    @Value("${server.port}")
    private Integer port;
    @Value("${alipay.pay.appid}")
    private String appid;
    @Value("${alipay.pay.notify}")
    private String notify;
    @Value("${java.version}")
    private String javaVersion;
    @Value("${JAVA_HOME}")
    private String javaHome;
    @Value("${MAVEN_HOME}")
    private String mavenHome;
    @Value("#{11*2}")
    private Integer number;

    @GetMapping("/read/file")
    public Map<String, Object> readInfo1() {
        Map<String, Object> map = new HashMap<>();
        map.put("port", environment.getProperty("server.port"));
        map.put("appid", environment.getProperty("alipay.pay.appid"));
        map.put("notify", environment.getProperty("alipay.pay.notify"));
        map.put("javaversion", environment.getProperty("java.version"));
        map.put("javahome", environment.getProperty("JAVA_HOME"));
        map.put("mavenhome", environment.getProperty("MAVEN_HOME"));
        map.put("number",environment.getProperty("number"));
        return map;
    }

    @GetMapping("/read/value")
    public Map<String, Object> readInfo2() {
        Map<String, Object> map = new HashMap<>();
        map.put("port", port);
        map.put("appid", appid);
        map.put("notify", notify);
        map.put("javaversion", javaVersion);
        map.put("javahome", javaHome);
        map.put("mavenhome", mavenHome);
        map.put("number",number);
        return map;
    }

    @GetMapping("/read/v2")
    public Map<String, Object> r2() {
        Map<String, Object> map = new HashMap<>();
        map.put("port", port);
        map.put("appid", appid);
        map.put("notify", notify);
        map.put("javaversion", javaVersion);
        map.put("javahome", javaHome);
        map.put("mavenhome", mavenHome);
        map.put("number",number);
        return map;
    }
}

　application.properties

# 应用名称
spring.application.name=demo
# 应用服务 WEB 访问端口
server.port=8080
spring.main.banner-mode=console
alipay.pay.appid=123456
alipay.pay.notify=http://www.xxx.com
person.grade=0
person.list=a,b,c
person.last-name=张坤
person.sno=1223
number=11

server.servlet.encoding.charset=utf-8
server.servlet.encoding.force=true
server.servlet.encoding.enabled=true

　SpringBootApplicationTest.java

package com.zk.demo;

import com.zk.demo.Person;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootApplicationTest {

    @Autowired
    Person person;
    @Test
    public void ContextLoads(){
        System.out.println(person);
    }
}

运行Test测试用例

报错如下：

java.lang.IllegalStateException: Failed to load ApplicationContext

	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
	at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189)
	at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'person': Could not bind properties to Person (prefix=person, ignoreInvalidFields=false, ignoreUnknownFields=true, ignoreNestedProperties=false); nested exception is org.springframework.validation.BindException: org.springframework.boot.bind.RelaxedDataBinder$RelaxedBeanPropertyBindingResult: 1 errors
Field error in object 'person' on field 'lastName': rejected value [张坤]; codes [Email.person.lastName,Email.lastName,Email.java.lang.String,Email]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [person.lastName,lastName]; arguments []; default message [lastName],[Ljavax.validation.constraints.Pattern$Flag;@7cbee484,org.springframework.validation.beanvalidation.SpringValidatorAdapter$ResolvableAttribute@7f811d00]; default message [不是一个合法的电子邮件地址]
	at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:335)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:292)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
	... 24 more
Caused by: org.springframework.validation.BindException: org.springframework.boot.bind.RelaxedDataBinder$RelaxedBeanPropertyBindingResult: 1 errors
Field error in object 'person' on field 'lastName': rejected value [张坤]; codes [Email.person.lastName,Email.lastName,Email.java.lang.String,Email]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [person.lastName,lastName]; arguments []; default message [lastName],[Ljavax.validation.constraints.Pattern$Flag;@7cbee484,org.springframework.validation.beanvalidation.SpringValidatorAdapter$ResolvableAttribute@7f811d00]; default message [不是一个合法的电子邮件地址]
	at org.springframework.boot.bind.PropertiesConfigurationFactory.checkForBindingErrors(PropertiesConfigurationFactory.java:359)
	at org.springframework.boot.bind.PropertiesConfigurationFactory.doBindPropertiesToTarget(PropertiesConfigurationFactory.java:276)
	at org.springframework.boot.bind.PropertiesConfigurationFactory.bindPropertiesToTarget(PropertiesConfigurationFactory.java:240)
	at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:330)
	... 42 more

 这个lastName校验位Email格式，但是配置文件中的lastName不为Email

常见参数

@NotNull(message="名字不能为空")
private String userName;
@Max(value=120,message="年龄最大不能查过120")
private int age;
@Email(message="邮箱格式错误")
private String email;
 
 
空检查
@Null       验证对象是否为null
@NotNull    验证对象是否不为null, 无法查检长度为0的字符串
@NotBlank   检查约束字符串是不是Null还有被Trim的长度是否大于0,只对字符串,且会去掉前后空格.
@NotEmpty   检查约束元素是否为NULL或者是EMPTY.
    
Booelan检查
@AssertTrue     验证 Boolean 对象是否为 true  
@AssertFalse    验证 Boolean 对象是否为 false  
    
长度检查
@Size(min=, max=) 验证对象（Array,Collection,Map,String）长度是否在给定的范围之内  
@Length(min=, max=) string is between min and max included.
 
 
日期检查
@Past       验证 Date 和 Calendar 对象是否在当前时间之前  
@Future     验证 Date 和 Calendar 对象是否在当前时间之后  
@Pattern    验证 String 对象是否符合正则表达式的规则