Spring4下validation数据校验无效(maven)

SpringMVC4使用数据校验的时候需要使用hibernate-validator的包

• 第一步添加依赖

    <dependency>      <groupId>javax.validation</groupId>      <artifactId>validation-api</artifactId>      <version>2.0.0.Final</version>    </dependency>    <dependency>      <groupId>org.hibernate</groupId>      <artifactId>hibernate-validator</artifactId>      <version>5.4.1.Final</version>    </dependency>

• 第二步添加校验注解

package com.demo.model;/** spring4 用hibernate中的validation* * */import org.hibernate.validator.constraints.Email;import org.hibernate.validator.constraints.NotBlank;import javax.validation.constraints.Size;public class User {    private String username;    private String password;    private String nickname;    private String email;    public User(){    }    public User(String username, String password, String nickname, String email) {        this.username = username;        this.password = password;        this.nickname = nickname;        this.email = email;    }    @NotBlank(message = "用户名不能为空")    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    @Size(min = 6,max = 20,message = "密码为6-20位")    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getNickname() {        return nickname;    }    public void setNickname(String nickname) {        this.nickname = nickname;    }    @Email(message = "请输入合法的邮箱")    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }}

• 第三步在控制器中对指定参数进行校验注解 (注:BindingResult 必须紧跟在@Validate)

    //@Validated指定验证对象 BindingResult紧跟Validated    @RequestMapping(value="/add",method = RequestMethod.POST)    public String add(@Validated User user, BindingResult br){        System.out.println(br);        System.out.println(br.getErrorCount());        if(br.hasErrors())            return "user/add";        users.put(user.getUsername(),user);        return "redirect:/user/users";    }

• 注：这个配置也会影响到校验是否生效

<mvc:annotation-driven/>