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数据校验 也叫 数据验证

比较常用的 Hibernate validater

1.引jar包  4个

 

     
       
     
      org.hibernate
        
     
      hibernate-validator
        
     
      4.0.1.GA
      
     
     
       
     
      org.jboss.logging
        
     
      jboss-logging
        
     
      3.3.0.Final
      
     
     
       
     
      javax.validation
        
     
      validation-api
        
     
      1.0.0.GA
      
     
     
       
     
      org.slf4j
        
     
      slf4j-api
        
     
      1.7.21
      
     2.配置验证器

3在Model上打标记

public class UserInfo {
       //需是0~100之间     @Min(value = 0,message = "成绩最小值为{value}")     @Max(value = 100,message = "成绩最大值为{value}")     private  Integer score;     @NotEmpty(message = "用户不能为空")     @Size(min = 4,message = "名称至少4个")     private  String  name;     @NotEmpty(message = "手机号不能为空")     @Pattern(regexp = "^1[3,4,5,6,7,8,9]\\d{9}$",message = "手机号码不正确")     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

植入二个参数

@Controller public class FirstController {
       @RequestMapping("/first")     public ModelAndView doFirst(@Valid UserInfo info, BindingResult br) {
           ModelAndView mv = new ModelAndView();         mv.setViewName("/WELCOME.jsp");         //侦测错误验证总数的方法         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;     } }