डेटा सत्यापन - जावा और स्प्रिंग सत्यापन

• मानक जावा आवेदन
• वसंत का उपयोग करना
• जावा + स्प्रिंग एसोसिएशन
• स्प्रिंग mvc

एक मानक जावा अनुप्रयोग में मान्यता

अशक्त , @DecimalMin, @Digits, पैटर्न , ईमेल , आदि।

import javax.validation.constraints.Digits; import javax.validation.constraints.Size; public class Person { @Size(min=2, max=50) private String Name; @Digits(integer=3, fraction=0, message = "  3- ") @PersonAgeConstraint private Integer age; public Person(String name, Integer age) { Name = name; this.age = age; } } 

 @Target({ElementType.METHOD, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) @Constraint(validatedBy=PersonAgeConstraintValidator.class) public @interface PersonAgeConstraint { String message() default "{value.negative}"; Class<?>[] groups() default {}; Class<? extends Payload>[] payload() default {}; } 

value.negative = ऋणात्मक मान

 public class PersonAgeConstraintValidator implements ConstraintValidator<PersonAgeConstraint, Integer> { @Override public boolean isValid(Integer age, ConstraintValidatorContext constraintValidatorContext) { return age > 0; } } 

 import javax.validation.Validator; /** * Test Validation */ public class DemoJValidationApplicationTests { //  Validator private static Validator validator; static { ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory(); validator = validatorFactory.usingContext().getValidator(); } @Test public void testValidators() { final Person person = new Person(" ", -4500); Set<ConstraintViolation<Person>> validates = validator.validate(person); Assert.assertTrue(validates.size() > 0); validates.stream().map(v -> v.getMessage()) .forEach(System.out::println); } } 

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>DemoJSRvalidation</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>DemoJSRvalidation</name> <description>Demo project for Spring Boot JSR-303 validation</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 

 public class Person { @HealthConstraint(groups = Health.class) private Documents healthDocuments; @ProfessionalConstraint(groups = Professional.class) private Documents ProfessionalDocuments; //... } 

 @Target({ElementType.METHOD, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) @Constraint(validatedBy=HealthConstraintValidator.class) public @interface HealthConstraint { String message() default "{health.documents}"; Class<?>[] groups() default {}; Class<? extends Payload>[] payload() default {}; } 

 public class HealthConstraintValidator implements ConstraintValidator<HealthConstraint, Documents> { @Override public boolean isValid(Documents documents, ConstraintValidatorContext constraintValidatorContext) { return documents.contains(" 1"); } } 

  @Test public void healthAndProfessionalValidators() { final Person person = new Person(" ", 45); person.setHealthDocuments(new Documents(Arrays.asList(" 1", " 3"))); person.setProfessionalDocuments(new Documents(Arrays.asList(" 1", " 4"))); //    Set<ConstraintViolation<Person>> validates = validator.validate(person, Health.class); Assert.assertTrue(validates.size() == 0); //    ,  .  validates = validator.validate(person, Professional.class); Assert.assertTrue(validates.size() == 0); } 

 public class Documents { private List<String> tests = new ArrayList(); public Documents(List<String> tests) { this.tests.addAll(tests); } public boolean contains(String test) { return this.tests.contains(test); } } 

वसंत का उपयोग कर मान्यता

(Org.springframework.validation.Validator)

(Javax.validation.Validator)

 @Service public class PersonValidator implements Validator { @Override public boolean supports(Class<?> aClass) { return Person.class.equals(aClass); } @Override public void validate(Object obj, Errors errors) { Person p = (Person) obj; if (p.getAge() < 0) { errors.rejectValue("age", "value.negative"); } } } 

 @RunWith(SpringRunner.class) @SpringBootTest public class DemoJValidationApplicationTests { //    private static final ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource(); static { messageSource.setBasename("message"); } @Autowired private PersonValidator personValidator; @Test public void testValidators() { final Person person = new Person(" ", -4500); final DataBinder dataBinder = new DataBinder(person); dataBinder.addValidators(personValidator); dataBinder.validate(); Assert.assertTrue(dataBinder.getBindingResult().hasErrors()); if (dataBinder.getBindingResult().hasErrors()) { dataBinder.getBindingResult().getAllErrors().stream(). forEach(e -> System.out.println(messageSource .getMessage(e, Locale.getDefault()))); } } } 

 public class OtherValidator implements Validator { @Override public boolean supports(Class<?> aClass) { return Person.class.equals(aClass); } @Override public void validate(Object obj, Errors errors) { // ... } } //--------- @Service public class PersonValidator implements Validator { /** *   */ @Autowired private OtherValidator otherValidator; @Override public void validate(Object obj, Errors errors) { Person p = (Person) obj; if (p.getAge() < 0) { errors.rejectValue("age", "value.negative"); } //   ,   otherValidator.validate(obj, errors); } } 

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>DemoJSRvalidation</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>DemoJSRvalidation</name> <description>Demo project for Spring Boot JSR-303 validation</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 

जावा और स्प्रिंग

 import javax.validation.Validator; @Service public class PersonValidator implements org.springframework.validation.Validator { // javax.validation.Validator @Autowired private Validator validator; @Override public boolean supports(Class<?> aClass) { return Person.class.equals(aClass); } @Override public void validate(Object obj, Errors errors) { Set<ConstraintViolation<Object>> validates = validator.validate(obj); for (ConstraintViolation<Object> constraintViolation : validates) { String propertyPath = constraintViolation.getPropertyPath().toString(); String message = constraintViolation.getMessage(); errors.rejectValue(propertyPath, "", message); } Person p = (Person) obj; if (p.getAge() < 0) { errors.rejectValue("age", "only.positive.numbers"); } } } 

  @Test public void testValidators() { final Person person = new Person("", -4500); final DataBinder dataBinder = new DataBinder(person); dataBinder.addValidators(personValidator); dataBinder.validate(); if (dataBinder.getBindingResult().hasErrors()) { dataBinder.getBindingResult().getAllErrors() // .... 

स्प्रिंग mvc

 import org.springframework.validation.Validator; @Controller public class DemoJValidationController { @Autowired @Qualifier("personValidator") // spring validator private Validator personValidator; @InitBinder protected void initBinder(WebDataBinder binder) { binder.setValidator(personValidator); } @GetMapping("/") public String savePersonAction(ModelMap model) { model.addAttribute("person", new Person(null, null)); return "personEdit"; } @RequestMapping(value = "/save", method = RequestMethod.POST) public String savePersonAction( @Valid @ModelAttribute("person") Person person, BindingResult bindingResult, Model model) { if (bindingResult.hasErrors()) { return "personEdit"; // to person.jsp page } model.addAttribute("name", person.getName()); model.addAttribute("age", person.getAge()); return "saveSuccess"; // to saveSuccess.jsp page } @RequestMapping(value = "/edit", method = RequestMethod.POST) public String editPersonAction(ModelMap model) { model.addAttribute("person", new Person(null, null)); return "personEdit"; // to personEdit.jsp page; } } 

 @Controller public class DemoJValidationController { @Autowired @Qualifier("personValidator") // spring validator private Validator personValidator; //... @RequestMapping(value = "/save", method = RequestMethod.POST) public String savePersonAction( @Valid @ModelAttribute("person") Person person, BindingResult bindingResult, Model model) { // spring validate personValidator.validate(person, bindingResult); if (bindingResult.hasErrors()) { return "personEdit"; // to person.jsp page } model.addAttribute("name", person.getName()); model.addAttribute("age", person.getAge()); return "saveSuccess"; // to saveSuccess.jsp page } } 

 @SpringBootApplication @ImportResource("classpath:configuration.xml") public class DemoJValidationApplication { public static void main(String[] args) { SpringApplication.run(DemoJValidationApplication.class, args); } } 

 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/c" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> <property name="basename" value="classpath:message"/> <property name="defaultEncoding" value="UTF-8"/> </bean> <mvc:annotation-driven/> <mvc:resources mapping="/resources/**" location="classpath:/META-INF/resources/"/> </beans> 

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <link href="<c:url value="/resources/my.css" />" rel="stylesheet"> <title>Person</title> </head> <body> <h3> Enter Person. </h3> <form:form method="POST" modelAttribute="person" action="save"> <div> Name: <form:input path="name"/> <form:errors path="name" cssClass="error"/> </div> <div> Age: <form:input path="age"/> <form:errors path="age" cssClass="error"/> </div> <button type="submit">Registration</button> </form:form> </body> </html> 

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <link href="<c:url value="/resources/my.css" />" rel="stylesheet"> <title>Person Saved Successfully</title> </head> <body> <h3> Person Saved Successfully. </h3> <form:form method="POST" modelAttribute="person" action="edit"> <div> ${name} </div> <div> ${age} </div> <button type="submit">Edit</button> </form:form> </body> </html> 

 span.error { color: red; } form div{ margin: 5px; } 

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>DemoJSRvalidation</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>DemoJSRvalidation</name> <description>Demo project for Spring Boot JSR-303 validation</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>4.1.0.Final</version> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>