數據校驗

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數據校驗 也叫 數據驗證

比較經常使用的 Hibernate validater

1.引jar包  4個

 

<!--數據驗證-->
<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator</artifactId>
  <version>4.0.1.GA</version>
</dependency>

<!--jboss logging-->
<dependency>
  <groupId>org.jboss.logging</groupId>
  <artifactId>jboss-logging</artifactId>
  <version>3.3.0.Final</version>
</dependency>

<!--validation api-->
<dependency>
  <groupId>javax.validation</groupId>
  <artifactId>validation-api</artifactId>
  <version>1.0.0.GA</version>
</dependency>

<!--slf4j api   日誌接口-->
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.21</version>
</dependency>
2.配置驗證器

<!-- 驗證器 -->
<bean id="myValidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
 <property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>

</bean>

<!-- MVC註解驅動 -->
<mvc:annotation-driven validator="myValidator"></mvc:annotation-driven>

3在Model上打標記

public class UserInfo {
    //需是0~100之間
    @Min(value = 0,message = "成績最小值爲{value}")
    @Max(value = 100,message = "成績最大值爲{value}")
    private  Integer score;

    @NotEmpty(message = "用戶不能爲空")
    @Size(min = 4,message = "名稱至少4個")
    private  String  name;

    @NotEmpty(message = "手機號不能爲空")
    @Pattern(regexp = "^1[3,4,5,6,7,8,9]\\d{9}$",message = "手機號碼不正確")
    private String phone;

    public Integer getScore() {
        return score;
    }

    public void setScore(Integer score) {
        this.score = score;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
}

4 在Controller方法中
植入二個參數

@Controller
public class FirstController {
    @RequestMapping("/first")
    public ModelAndView doFirst(@Valid UserInfo info, BindingResult br) {
        ModelAndView mv = new ModelAndView();
        mv.setViewName("/WELCOME.jsp");
        //偵測錯誤驗證總數的方法
        int errorcount = br.getErrorCount();
        if (errorcount > 0) {
            FieldError score = br.getFieldError("score");
            FieldError name = br.getFieldError("name");
            FieldError phone = br.getFieldError("phone");

            if (score != null) {
                mv.addObject("scoremsg", score.getDefaultMessage());
            }
            if (name != null) {
                mv.addObject("namemsg", name.getDefaultMessage());
            }
            if (phone != null) {
                mv.addObject("phonemsg", phone.getDefaultMessage());
            }
            mv.setViewName("/index.jsp");
        }
        return mv;

    }
}