Spring MVC uses the jsr303 Bean Validation Validation Framework

This is a specification that defines elements for the data validation of the bean, such as your model has a user.java, there is an email, when the user registration to verify that the email is legitimate. The general practice is JS front-end verification, but not secure, as a complete security solution, we have to back-end verification.

Table 1. Built-in constraint in Bean Validation

Constraint More information

@Null The annotated element must be Null

@NotNull Annotated element must not be null

@AssertTrue The annotated element must be true

@AssertFalse The annotated element must be false

@Min (value) The annotated element must be a number whose value must be greater than or equal to the specified minimum value

@Max (value) The annotated element must be a number whose value must be less than or equal to the specified maximum value

@DecimalMin (value) The annotated element must be a number whose value must be greater than or equal to the specified minimum value

@DecimalMax (value) The annotated element must be a number whose value must be less than or equal to the specified maximum value

@Size (max, min) the size of the annotated element must be within the specified range

@Digits (integer, fraction) The annotated element must be a number whose value must be within an acceptable range

@Past The annotated element must be a past date

@Future The annotated element must be a future date

@Pattern (value) The annotated element must conform to the specified regular expression hibernate has implemented and extended the specification;

Constraint More information

@Email The annotated element must be an e-mail address

@Length The size of the annotated string must be within the specified range

@NotEmpty The annotated string must be non-empty

@Range The annotated element must be within the appropriate range

2,jsr303 implementation

At present, the implementation of a better Validation has Hibernate Validator, which is the reference implementation of Bean Validation. Hibernate Validator provides the implementation of all the built-in constraint in the JSR 303 specification, in addition to some additional constraint. Can be used independently, even if your schema is spring MVC + Ibatis can also be used alone with this validation framework. The benefits look below to know:

How to use jsr303 in 3,spring MVC validation

1) First configure the spring configuration based on the annotion annotation driver

<mvc:annotation-driven/>

2) related jar package, if using Maven

[HTML]

<repositories>

<repository>

<id>jboss repository</id>

<url>http://repository.jboss.org/nexus/content/groups/public/</url>

</repository>

</repositories>

<properties>

<spring.version>3.0.5.RELEASE</spring.version>

</properties>

<dependencies>

<!--Spring 3 dependencies

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>${spring.version}</version>

</dependency>

<!--Hibernate Validator--

<dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-validator</artifactId>

<version>4.2.0.Final</version>

</dependency>

</dependencies>

If it's not maven, come down and Hibernate-validator.jar the project alone.

3) declared in model (some object of data interaction, or VO)

[Java]

@NotEmpty (message= "name cannot be empty")

private String name;

@NotEmpty (message= "Email cannot be empty")

@Email (message= "Email format is not valid")

Private String Email;

[Java]

4) Use @valid and Bindingresult in the controller:

[Java] View plaincopy

<span style= "FONT-SIZE:18PX;" > @RequestMapping (value= "/test")

@ResponseBody

Private user test (@Valid user u,bindingresultresult) {

if (Result.haserrors ()) {//This is the result object returned by spring validation checksum

If the checksum fails, what do you want to do?

String code = Result.getfielderror (). GetCode ();//Verify the type name of the error such as Notempty

Result.getfielderror (). Getdefaultmessage ());//Error message

return m;

}else{

return null;

}

}</span>

5) on the page if you need to display an error, either by using the El expression to take the model median, or you can use the Spring form label:

<form:errors path= "*" cssclass= "errorblock" element= "div"/>

Finally, I am using spring mvc+ MyBatis, hibernate validation is a separate piece and ORM does not have much relationship. Ibatis is not implemented in the validation specification.

Spring MVC uses the jsr303 Bean Validation Validation Framework