Spring Boot - axios download file（带请求头下载、预览 PDF 文件，非前后端分离）
16lz
2021-04-22
目录
- 项目
- 参考
项目
新建 Spring Starter Project，编辑 pom.xml 文件，引入依赖：
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <groupId>com.mk</groupId> <artifactId>spring-boot-axios-download-file</artifactId> <version>1.0.0</version> <name>spring-boot-axios-download-file</name> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!-- Commons IO --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> </exclude> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build></project>
IndexController 控制器：
package com.mk.controller;import java.io.File;import java.io.IOException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.io.FileUtils;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.GetMapping;@Controllerpublic class IndexController { @GetMapping({"", "/index"}) public String index() { return "index"; } @GetMapping("/download") public void download(HttpServletRequest request, HttpServletResponse response) throws IOException { String authorization = request.getHeader("Authorization"); System.out.println(authorization); byte[] bytes = FileUtils.readFileToByteArray(new File("E:/stm32/w25q128fv rev.m 05132016 kms.pdf")); ServletOutputStream os = response.getOutputStream(); response.setHeader("Content-Type", "application/pdf"); os.write(bytes); os.flush(); os.close(); }}启动类：
package com.mk;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); }}src/main/resources/templates/index.html 文件：
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>Download File</title> </head> <body> <input type="button" id="download" value="download" /> <input type="button" id="preview" value="preview" /> <br /> <iframe width="100%" height="500"></iframe> <script type="text/javascript" src="/js/axios.min.js"></script> <script type="text/javascript"> window.onload = (event) => { const downloadButton = document.getElementById('download') const previewButton = document.getElementById('preview') const iframe = document.querySelector('iframe') downloadButton.onclick = function(event) { const url = '/download' const method = 'GET' const headers = { 'Authorization': '1234567890' } const responseType = 'blob' axios({ url, method, headers, responseType }).then(response => { console.log(response) const blob = response.data const objectURL = URL.createObjectURL(blob) const a = document.createElement('a') a.href = objectURL a.download = "123.pdf" a.click() URL.revokeObjectURL(objectURL) }).catch(error => console.error(error)) } previewButton.onclick = function(event) { const url = '/download' const method = 'GET' const headers = { 'Authorization': '1234567890' } const responseType = 'blob' axios({ url, method, headers, responseType }).then(response => { console.log(response) const blob = response.data const objectURL = URL.createObjectURL(blob) iframe.setAttribute('src', objectURL) URL.revokeObjectURL(objectURL) }).catch(error => console.error(error)) } } </script> </body></html>更多相关文章
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