SpringBoot Online Preview PDF file (pdf.js reference tool)

This project uses PDF.js Demo online PDF reader plug-in implementation function PDF.js plug-Download

Can be measured!

1, create SpringBoot project directory structure is as follows:

2, project configuration:

pom.xml:

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.han</groupId>
    <artifactId>online-read-pdf</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
        <relativePath />
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>
 
</project>

PDFApplication.java

Package Comkhaan;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class PDFApplication {
    public static void main(String[] args) {
        SpringApplication.run(PDFApplication.class, args);
    }
}

IndexController.java

package com.han.controller;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
public class IndexController {
    
    @RequestMapping(value = "/preview", method = RequestMethod.GET)
    public void pdfStreamHandler(HttpServletRequest request, HttpServletResponse response) {
        //PDF文件地址
        File file = new File("E:\\pdf\\pdf\\GJB 8748-2015(GJB 6482-2008k).pdf");
        if (file.exists()) {
            byte[] data = null;
            FileInputStream input=null;
            try {
                input= new FileInputStream(file);
                data = new byte[input.available()];
                input.read(data);
                response.getOutputStream().write(data);
            } catch (Exception e) {
                System.out.println ( "PDF File Exception:" + E);
            }finally{
                try {
                    if(input!=null){
                        input.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace ();
                }
            }
        }
    }
}

index.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>在线阅读PDF文件</title>
</head>
<script>
    function onLineReadPDF() {
        window.open("/js/web/viewer.html?file=/preview");
    }
</ Script > 
< body > 
    < h1 onclick = "onLineReadPDF ()" > Read online PDF file </ h1 > 
</ body > 
</ HTML >

Operating results renderings:

SpringBoot Online Preview PDF file (pdf.js reference tool)

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