springmvc之JSR303数据校验

1.搭建环境

<dependencies>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>4.11</version>      <scope>test</scope>    </dependency>    <dependency>    <groupId>commons-logging</groupId>    <artifactId>commons-logging</artifactId>    <version>1.1.3</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-core</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-context</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-beans</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-expression</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-webmvc</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-web</artifactId>    <version>4.0.5.RELEASE</version></dependency><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-tx</artifactId>    <version>4.0.5.RELEASE</version></dependency>        <dependency>    <groupId>commons-logging</groupId>    <artifactId>commons-logging</artifactId>    <version>1.1.1</version>    </dependency><dependency>    <groupId>org.hibernate</groupId>    <artifactId>hibernate-validator</artifactId>    <version>4.3.0.Final</version></dependency><dependency>            <groupId>org.jboss.logging</groupId>    <artifactId>jboss-logging</artifactId>            <version>3.1.0.CR2</version></dependency><dependency>    <groupId>javax.validation</groupId>    <artifactId>validation-api</artifactId>    <version>1.0.0.GA</version></dependency>  </dependencies>

2.web.xml文件

<filter><description>字符集过滤器</description><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><description>字符集编码</description><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- <init-param><param-name>contextConfigLocation</param-name><param-value>classpath:conf/spring.xml</param-value></init-param> --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping>

3.模型类

public class User {private Integer id;@NotEmptyprivate String username;@NotEmptyprivate String password;@Past@DateTimeFormat(pattern="yyyy-MM-dd")private Date birth;@NumberFormat(pattern="#,###,###.##")private double salary;@Emailprivate String email;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public Date getBirth() {return birth;}public void setBirth(Date birth) {this.birth = birth;}public double getSalary() {return salary;}public void setSalary(double salary) {this.salary = salary;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}@Overridepublic String toString() {return "User [id=" + id + ", username=" + username + ", password="+ password + ", birth=" + birth + ", salary=" + salary+ ", email=" + email + "]";}}

4.控制器

@RequestMapping("/viewResolver")@Controllerpublic class ViewResolver {@RequestMapping("/testView")public String testView(@Validated User user,BindingResult result){System.out.println(user);if(result.getErrorCount() > 0){System.out.println("出错了!");for(FieldError error:result.getFieldErrors()){System.out.println(error.getField() + ":" + error.getDefaultMessage());}}return "result";}}

5.页面

input.jsp文件：

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Input</title></head><body><form action="viewResolver/testView" method="post">姓名：<input type="text" name="username"/><br><br>密码：<input type="password" name="password"/><br><br>生日：<input type="text" name="birth"/><br><br>薪水：<input type="text" name="salary"/><br><br>email：<input type="text" name="email"/><br><br><input type="submit" value="提交"/></form></body></html>

结果：

JSR303就是一个为javabean的字段做合法性校验的框架。

常用注解：

注解说明@Null注释的元素必须为空@NotNull注释的元素必须不为空@AssertTrue注释的元素必须为true@AssertFalse注释的元素必须为false@Min(value)注释的值为数字，且其大小必须大于最小值@Max(value)注释的值为数字，且其大小必须小于最大值@DecimalMin（value）注释的值为数字，且其大小必须大于等于最小值@DecimalMax（value）注释的值为数字，且其大小必须小于等于最大值@Size（max，min）注释的值的元素的大小必须在指定的范围内@Digits(integer，fraction)注释的值必须为数字，且其值须在范围内@Past注释的值元素为过去的日期@Future注释的值元素必须为将来的日期@Pattern（value）注释的值必须符合指定的正则表达式