一、后期筹备
开发环境
- JDK：1.8
- Tomcat：9.0.3
- 编译器：IntelliJ IDEA 2019
- maven：3.6.3
- spring：5.2.8
- 留神：肯定须要commons-fileupload和commons-io包，在maven中我曾经配置了，如果不应用Maven的能够到maven repository下来下载
pom.xml配置
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <spring.version>5.2.8.RELEASE</spring.version> <slf4j.version>1.6.6</slf4j.version> <log4j.version>2.13.3</log4j.version></properties><dependencies> <!-- spring --> <!-- beans--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <!-- core--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <!-- aop相干的技术 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <!-- aop --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <!-- context容器 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!-- web --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <!-- webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- spring测试 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency><!-- 文件的上传与下载--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency></dependencies> <build> <finalName>TestSSM</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build>
二、上传与下载
文件的上传
<?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:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 开启spring注解驱动--> <context:component-scan base-package="com.cjh"/> <!-- 开启mvc注解驱动--> <mvc:annotation-driven></mvc:annotation-driven> <!-- 配置文件解析器--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 配置上传文件的大小--> <property name="maxUploadSize" value="20480000"/> </bean></beans>
<%@ page contentType="text/html; charset=UTF-8" language="java" %><html><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>cai jin hong</title></head><body> <form action="upload.do" method="post" enctype="multipart/form-data"> <input type="text" name="text" value=""> <input type="file" name="upload" value=""> <input type="submit" value="submit"> </form></body></html>
@Controllerpublic class UserController { //文件的上传 /** * @param text 类型为text的input标签输入框内容，与input标签的name属性的名字统一 * @param upload 文件对象，与类型为file的input标签中的name属性的名字统一 * @return //跳转到一个新的页面 * @throws IOException */ @RequestMapping("upload.do") public String upload(String text, MultipartFile upload) throws IOException { System.out.println(text); //获取文件名字 String fileName = upload.getOriginalFilename(); //传输到指定地位 upload.transferTo(new File("D://test//", fileName)); return "welcome.jsp"; }}
文件的下载
<%@ page contentType="text/html; charset=UTF-8" language="java" %><html><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>cai jin hong</title></head><body> <a href="download.do?fileName=订单列表.xls">文件下载</a></body></html>
@Controllerpublic class UserController { //文件的下载 @RequestMapping("download.do") public ResponseEntity<byte[]> upload(String fileName) throws IOException { System.out.println("fileName:" + fileName); //获取文件对象 File file = new File("D://test//" + fileName); //解决中文字符集 // fileName = new String(fileName.getBytes("UTF-8"), "ISO-8859-1"); //设置响应头信息 HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); headers.setContentDispositionFormData("attachment", fileName); byte[] b = FileUtils.readFileToByteArray(file); return new ResponseEntity(b, headers, HttpStatus.CREATED); }}