[Spring boot支持pdf 预览 ] 详细教程

红太狼 2023-09-30 17:41 10阅读 0赞

**目录**

前言:

controller:

index.html

pom依赖:

效果展示:

--------------------

## 前言: ##

> 日常一写

**我代码访问路径是:**

[http://localhost:8089/look][http_localhost_8089_look]

#### controller: ####

package com.example.demo;
    
    import java.io.Closeable;
    import java.io.File;
    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.net.URLEncoder;
    
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.commons.io.FileUtils;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    
    @Controller
    public class IndexController {
    
        @GetMapping({"", "/"})
        public String index() {
            return "index";
        }
    
        @GetMapping("/look")
        public void download(HttpServletResponse response) {
            String pathname = "D:/查看pdf";
            String filename = "Java 8实战.pdf";
    
            File file = new File(pathname, filename);
            try {
                response.setHeader("Content-Disposition", "inline; filename*=UTF-8''" + URLEncoder.encode(file.getName(), "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
    
            ServletOutputStream os = null;
            try {
                os = response.getOutputStream();
                os.write(FileUtils.readFileToByteArray(file));
                os.flush();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (os != null) {
                    close(os);
                }
            }
        }
    
        private void close(Closeable closeable) {
            if (closeable != null) {
                try {
                    closeable.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

#### index.html ####

<!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <style type="text/css">
                a {
                    text-decoration: none;
                    display: block;
                    margin-top: 10px;
                }
            </style>
    </head>
    <body style="margin: 0; padding: 10px;">
    <a href="/look">PDF 预览</a>
    </body>
    </html>

### pom依赖: ###

这里面 除了commons-io 依赖是创建工程成功以后添加,

其他的依赖都是在创建springboot工程的时候 选择对应依赖就行

<?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>2.4.6</version>
    		<relativePath/> 
    	</parent>
    	<groupId>com.example</groupId>
    	<artifactId>demo</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>demo</name>
    	<description>Demo project for Spring Boot</description>
    	<properties>
    		<java.version>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.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    		<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>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

#### 效果展示: ####

如果pdf 是下载,说明内容有问题 打开不了

![5387437b9fa647698bf54bc17c6fc971.png][]

![35b287d98358446898fc051ed9cc2fe8.png][]

[http_localhost_8089_look]: http://localhost:8089/look
[5387437b9fa647698bf54bc17c6fc971.png]: https://img-blog.csdnimg.cn/5387437b9fa647698bf54bc17c6fc971.png
[35b287d98358446898fc051ed9cc2fe8.png]: https://img-blog.csdnimg.cn/35b287d98358446898fc051ed9cc2fe8.png