spring mvc jsr303验证

JSR 303标准的校验框架：
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.2.Final</version>
</dependency>


jsr303注解：https://www.cnblogs.com/rocky-AGE-24/p/5245022.html


jsp表单：
    <form action="<%=path%>/reg" method="post">
    用户名：<input type="text" name="userName" /><font color="red"><form:errors path="user.userName"></form:errors></font></br>
    年龄：<input type="text" name="age" /><font color="red"><form:errors path="user.age"></form:errors></font></br>
    密码:<input type="password" name="password" /><font color="red"><form:errors path="user.password"></form:errors></font></br>
    确认密码：<input type="password" name="repassword"><font color="red"><form:errors path="user.repassword"></form:errors></font></br>
    手机号码：<input type="text" name="phone" /><font color="red"><form:errors path="user.phone"></form:errors></font></br>
    邮箱：<input type="text" name="email" /><font color="red"><form:errors path="user.email"></form:errors></font></br>
    个人网址：<input type="text" name="website"><font color="red"><form:errors path="user.website"></form:errors></font></br>
    出生日期：    <input type="date" name="date" />  <br>
    <input type="button" onclick="checkSubmit()" value="提交">
    </form>


打印出表单验证不通过的信息：

1.导入标签：

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form" %>

<form:errors path="bean名.属性名"></form:errors></font>

2. web.xml配置:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring.xml</param-value>
</context-param>


<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

3. 添加spring.xml文件

controller：

建一个bean,bean的属性名为表单中的name

public class UserInfo {

@NotEmpty(message = "用户名不能为空")
private String userName;
@NotEmpty(message = "年龄不能为空")
@Range(min = 1, max = 120, message = "输入的年龄不合法")
private String age;
@NotEmpty(message = "密码不能为空")
@Size(max = 11, message = "输入的密码不能超过11位")
private String password;
@NotEmpty(message = "再次输入不能为空")
private String repassword;
@Size(min = 11, max = 11, message = "手机号码必须是11位")
private String phone;
@Email(message = "输入的不是一个合法的邮箱地址")
private String email;
@Pattern(message = "输入的网址格式不对", regexp = "^((https|http)?:\\/\\/)[^\\s]+")
private String website;

@DateTimeFormat(pattern = "yyyy-MM-dd")
private String date;


public String getDate() {
return date;
}


public void setDate(String date) {
this.date = date;
}


public String getUserName() {
return userName;
}


public void setUserName(String userName) {
this.userName = userName;
}


public String getAge() {
return age;
}


public void setAge(String age) {
this.age = age;
}


public String getPassword() {
return password;
}


public void setPassword(String password) {
this.password = password;
}


public String getRepassword() {
return repassword;
}


public void setRepassword(String repassword) {
this.repassword = repassword;
}


public String getPhone() {
return phone;
}


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


public String getEmail() {
return email;
}


public void setEmail(String email) {
this.email = email;
}


public String getWebsite() {
return website;
}


public void setWebsite(String website) {
this.website = website;
}


}

@ModelAttribute("user"):修改bean的名字，默认bean名是首字母小写

@Valid UserInfo user,BindingResult  error
@Valid：将表单中提交的数据绑定到对象中进行验证
BindingResult或Errors类型：保存校验结果的入参，BindingResult是Errors的子类

@RequestMapping(value="/reg",method=RequestMethod.POST)
public String reg(@ModelAttribute("user") @Valid UserInfo user,BindingResult  error) {
System.out.println(user.getDate());
if(!user.getPassword().equals(user.getRepassword())){
error.addError(new FieldError("user", "repassword", "两次密码不一致"));
}
if(error.hasErrors()){
return "/xx.jsp";
}
return "/xx.jsp";
}