Springmvc後臺校驗加檔案上傳（完整版）
阿新 • • 發佈：2018-11-27
後臺校驗 <!--資料驗證--> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>4.0.1.GA</version> </dependency> <!--jboss logging--> <dependency> <groupId>org.jboss.logging</groupId> <artifactId>jboss-logging</artifactId> <version>3.3.0.Final</version> </dependency> <!--validation api--> <dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <version>1.0.0.GA</version> </dependency> <!--slf4j api--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.21</version> </dependency 2：然後建立個實體類UserInfo 在這裡使用註解方法來校驗屬性 別忘了GET.SET public class UserInfo { /*必須是0到100之間*/ @Min(value = 0,message = "成績最小為{value}") @Max(value = 100,message = "最大值為{value}") private Integer score; /*手機號不能為空，必須是1開頭 第二位是34567*/ @NotEmpty(message = "手機號不能我為空") @Pattern(regexp = "^1[3,4,5,6,7,8,9]\\d{9}$",message = "手機號不正確") private String phone; //不能為空 //必須是6個字元以上 @NotEmpty(message = "使用者不能為空") @Size(min = 6,message = "名字至少6個字元") private String name; GET.SET 省略。。。。。。 3：然後controller裡來使用和jsp.介面接應 @Controller public class controller { @RequestMapping("/first") public ModelAndView doFist(@Valid UserInfo info, BindingResult br) { ModelAndView mv = new ModelAndView(); /*成功後跳的介面*/ mv.setViewName("/index.jsp"); /*有一個可以偵測到驗證錯誤總數的方法*/ int errorCount = br.getErrorCount(); if (errorCount > 0) { //證明模型驗證失敗 FieldError score = br.getFieldError("score");//5 FieldError name = br.getFieldError("name");//5 FieldError phone = br.getFieldError("phone");//5 if (score != null) { mv.addObject("scormsg", score.getDefaultMessage()); } if (name != null) { mv.addObject("namemsg", name.getDefaultMessage()); } if (phone != null) { mv.addObject("phonemsg", phone.getDefaultMessage()); } /*失敗後的介面*/ mv.setViewName("/log.jsp"); } return mv; } } 4：大配置裡的節點配置 <!--配置包掃描器--> <context:component-scan base-package="cn.hayyp.jiaoyan"></context:component-scan> <bean id="myValidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"> <property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property> </bean> <!--mvc註解驅動--> <mvc:annotation-driven validator="myValidator"/> 最後jsp.的介面 <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <html> <head> <title>商品</title> </head> <body> <h1>資料校驗</h1> <form action="/first" method="post"> 成績:<input name="score" /> <span>${scormsg }</span><br/><br/> 姓名:<input name="name"/><span>${namemsg }</span><br/><br/> 電話:<input name="phone"/><span>${phonemsg }</span><br/><br/> <input type="submit" value="註冊"/> </form> </body> </html> --------------------------------------------------------------------------------------------------------------------------------- 檔案上傳 第1步 <!--檔案上傳的jar包--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>1.4</version> </dependency> 第2步 建立一個類 FirstController 使用SpringMVC框架建立註解方法寫一個 檔案上傳的方法別忘了註解：如下 @Controller public class FirstController { @RequestMapping("/first") public String doFirst(MultipartFile upload, HttpSession session){ //獲取到使用者上傳的檔名字 String filename = upload.getOriginalFilename();//獲取到檔案的斷名 //將相對路徑轉換成絕對路徑 這個是建立在WEB-INF下面的檔名字 String realPath = session.getServletContext().getRealPath("/shangchuanwenjian"); //將file寫入指定的路徑 File file=new File(realPath,filename); try { upload.transferTo(file); return "/index.jsp"; } catch (IOException e) { e.printStackTrace(); return "/WJSC.jsp"; } 第3步： 大配置裡的配置檔案 <!--配置包掃描器--> <context:component-scan base-package="cn.hayyp.shangchuan"></context:component-scan> <!--配置檔案上傳的專用類--> <!--必須要是ID 要不好使--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean> <mvc:annotation-driven/> 然後把web.xml指定的配置檔名字改一下 <!--初始化引數--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContextWJSC.xml</param-value> </init-param> 這個是jsp,上傳頁面 <%-- Created by IntelliJ IDEA. User: Administrator Date: 2017/8/30 Time: 15:17 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>檔案上傳</h1> <%--檔案上上傳必須用post 和 enctype="multipart/form-data"--%> <form action="/first" method="post" enctype="multipart/form-data"> 檔案 <input type="file" name="upload"/> <input type="submit"/> </form> </body> </html>