SpringMVC 使用JSR-303进行校验

 共三个步骤：

一、pom.xm新增：

<!--使用JRS-303校验数据-->

<dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-validator</artifactId>

<version>5.1.3.Final</version>

</dependency>

<dependency>

<groupId>javax.validation</groupId>

<artifactId>validation-api</artifactId>

<version>1.1.0.Final</version>

</dependency>

<dependency>

<groupId>org.jboss.logging</groupId>

<artifactId>jboss-logging</artifactId>

<version>3.1.1.GA</version>

</dependency>

二、配置切面编程Aspect

2.1新建切面处理类，见附件1：ValidAspect 类

2.2.springmvc-servlet.xml中添加如下：

<!--切面开启-->

<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>

三、在controller层加入注释：如下

3.1参数加标记符如下：

/**

* Created by linzetian on 2016/11/10.

* Description:登录信息

*/

public classLogin {

@NotNull(message="登录名不能为空")

privateStringname;//登录名

@NotNull(message="密码不能为空")

privateStringpassword;//密码

publicStringgetName() {

returnname;

}

public void setName(String name) {

this.name= name;

}

publicStringgetPassword() {

returnpassword;

}

public void setPassword(String password) {

this.password= password;

}

}

3.2 在controller层加标记符如下：

@ResponseBody

publicResultlogin(@RequestBody @Valid Login bean,BindingResult result){

return new Result().success("操作成功");

}

注意：@Valid 注释表示要校验的参数，其后必须跟BindingResult变量

附件：

===============附件1：ValidAspect 类

packagecom.tecsun.das.collect.common.aspect;

importcom.tecsun.das.collect.common.result.RESULT_CODES;

importcom.tecsun.das.collect.common.result.Result;

importcom.tecsun.das.collect.common.util.StringUtils;

importorg.aspectj.lang.ProceedingJoinPoint;

importorg.aspectj.lang.annotation.Around;

importorg.aspectj.lang.annotation.Aspect;

importorg.aspectj.lang.reflect.MethodSignature;

importorg.springframework.beans.factory.annotation.Autowired;

importorg.springframework.stereotype.Component;

importorg.springframework.validation.BindingResult;

importorg.springframework.validation.ObjectError;

importjavax.validation.Valid;

importjavax.xml.validation.Validator;

importjava.lang.annotation.Annotation;

importjava.lang.reflect.Method;

/**

* Created by linzetian on 2016/11/10.

* Description:controller层校验切面类

*主要用户校验数据

*/

@Component

@Aspect

public classValidAspect {

/**

*含ResponseBody标识的方法进入切面编程

*@parampjp

*@return

*@throwsThrowable

*/

@Around("@annotation(org.springframework.web.bind.annotation.ResponseBody)")

publicObjectdoValid(ProceedingJoinPoint pjp)throwsThrowable{

MethodSignature signature = (MethodSignature) pjp.getSignature();

Method method = signature.getMethod();

if(!Result.class.equals(method.getReturnType())){

pjp.proceed();

}

Object[] args = pjp.getArgs();

Annotation[][] annotations = method.getParameterAnnotations();

for(inti =0;i < annotations.length;i++){

if(!hasValidAnnotation(annotations[i])){

continue;

}

if(!(i < annotations.length-1&& args[i+1]instanceofBindingResult)){

//验证对象后面没有跟bindingResult,事实上如果没有应该到不了这一步

continue;

}

BindingResult result = (BindingResult) args[i+1];

Result rt = getError(result);

if(RESULT_CODES.FAILL.equals(rt.getStatusCode())){

returnrt;

}

}

returnpjp.proceed();

}

/**

*判断是否包含Valid和Validated标签

*@paramannotations

*@return

*/

private booleanhasValidAnnotation(Annotation[] annotations){

if(annotations == null){

return false;

}

for(Annotation annotation : annotations){

if(annotationinstanceofValid

|| annotation instanceofValidated){

return true;

}

}

return false;

}

/**

*获取校验失败的错误信息

*@paramresult校验的结果

*@return校验通过“”校验失败：错误信息

*/

private staticResultgetError(BindingResult result){

try{

StringBuilder errorMg =newStringBuilder();

if(result.hasErrors()){

for(ObjectError error : result.getAllErrors()){

String fieldName = ((FieldError) error).getField();

errorMg.append(fieldName+error.getDefaultMessage()+",");

}

String errors = StringUtils.trimEnd(errorMg.toString(),",");

return newResult().fail(errors);

}

}catch(Exception e) {

e.printStackTrace();

}

return newResult().success("校验通过");

}

}