SSM-SpringMVC中利用hibernate-validator做後臺校驗
執行環境idea2018.2+maven3.5.4+jdk1.8+tomact8.5.34
一、第一步:引入包
在pom.xml中新增包,maven即可自動下載
<!--資料驗證-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.13.Final</version>
</dependency>
<!--validation api-->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
有些驗證還需要其他一些包,如正則表示式,slf4J等
<!--jboss logging-->
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3.0.Final</version>
</dependency>
<!-- 實現slf4j介面並整合 -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
二、第二步 配置Spring-mvc.xml
------裡面需要新配置一個驗證器,並且繫結註解驅動
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 掃描web相關的bean -->
<context:component-scan base-package="com.ssm.controller"/>
<!-- 開啟SpringMVC註解模式 -->
<mvc:annotation-driven/>
<!-- 靜態資源預設servlet配置 -->
<mvc:default-servlet-handler/>
<!-- 配置jsp 顯示ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--驗證器-->
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<!--注入hibernate的驗證器-->
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
</bean>
</beans>
三、修改web.xml中央排程器的上下文配置位置為上面那個配置檔案
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<welcome-file-list>
<welcome-file>/WEB-INF/views/login.jsp</welcome-file>
</welcome-file-list>
<display-name>ChatRobot</display-name>
<description>ChatRobot_Alpha_0.0.1</description>
<!-- 編碼過濾器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<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>
<!-- 配置DispatcherServlet -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置springMVC需要載入的配置檔案-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-*.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<!-- 匹配所有請求,此處也可以配置成 *.do 形式 -->
<!--/*.do是對所有以.do結尾的請求做處理,/*是對所有請求做處理-->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
四、在實體類裡面用註解做校驗,有些用正則表示式
package com.ssm.model;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.*;
public class User {
private Integer id;
@NotEmpty(message = "使用者名稱不能為空")
@Size(min = 2,max = 20,message = "使用者名稱的長度必須在{min}-{max}之間")
private String name;
@Max(value = 150,message = "最老150歲")
@Min(value = 0,message = "最小0歲")
private Integer age;
@NotEmpty(message = "手機號碼不能為空")
@Pattern(regexp = "^1[3|5|7|8|9]\\d{9}$",message = "手機號碼格式不正確")
private String phone;
@NotEmpty(message = "郵箱不能為空")
@Pattern(regexp = "^\\[email protected]\\w+\\.\\w+$",message = "郵箱格式不正確")
private String email;
private String sex;
@Length(min=6 ,max= 20 ,message = "密碼長度不符合標準")
private String password;
set、get方法省略、、、
}
五、控制器類UserController.java
@Valid表明引數User是要校驗的類,BindingResult是儲存錯誤資訊的類,兩者必須一一對應,並且位置挨著,不能中間有其他引數,
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/validatorZC")
public String validatorZC(@Valid User user, BindingResult br, Model model){
//判定br中錯誤數是否大於0,如果true,證明有一個驗證失敗了
if (br.getErrorCount()>0){
FieldError name=br.getFieldError("name");
FieldError password=br.getFieldError("password");
//哪個驗證失敗,就回顯示哪個
if(name!=null){
String namemsg = name.getDefaultMessage();
model.addAttribute("namemsg",namemsg);
}
if(password!=null){
String psdmsg = password.getDefaultMessage();
model.addAttribute("psdmsg",psdmsg);
}
//這個if裡面就是肯定有錯誤,回顯示名字
model.addAttribute("name",user.getName());
/*返回註冊頁面*/
return "login";
}
/*註冊成功*/
return "success";
}
六、註冊頁面register.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>資料校驗</h1>
<form action="${pageContext.request.contextPath}/user/validatorZC" method="post">
姓名:<input name="name" value="${name}"/><span>${namemsg }</span><br/><br/>
密碼:<input name="password"/><span>${psdmsg }</span><br/><br/>
<input type="submit" value="註冊"/>
</form>
</body>
</html>
七、註冊成功以後轉到scuuess.jsp頁面
<%@ page language="java" pageEncoding="utf-8" isELIgnored="false" %>
<html>
<body>
<h2>Success!</h2>
</body>
</html>
八、什麼都不輸入,提示效果圖如下:
九、執行中遇到一個報錯點:
程式碼失敗,Validation.buildDefaultValidatorFactory()異常:
java.lang.NoSuchMethodError: javax.validation.BootstrapConfiguration.getClockProviderClassName()Ljava/lang/String;
解決辦法如下:
把javaee的版本由7.0改為8.0
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>8.0</version>
<scope>provided</scope>
</dependency>
十、BUG
發現個bug:專案中即使name和password都按規定格式輸入了,依舊是不跳轉到success.jsp頁面。
解決辦法1:把User類中除了name和password之外的其他成員變數先註釋了,然後正常格式輸入name和password以後就跳轉到success頁面
解決辦法2:把除了name和password之外的成員變數上面的檢驗註釋刪掉,也可以跳轉到success頁面
我覺得應該是成員變數上面寫了檢驗註釋,即使註冊時沒有那個文字框,後臺自動在檢驗,只是沒有辦法輸出錯誤資訊而已。所以有錯誤還是返回login頁面。不跳轉到success頁面。
整體是在ssm框架基礎上修改的,該專案的整體程式碼如下:
https://download.csdn.net/download/nba_linshuhao/10692145
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原文:https://blog.csdn.net/nba_linshuhao/article/details/82875502