项目特性

1. 支持office，pdf等办公文档
2. 支持txt,java,php,py,md,js,css等所有纯文本
3. 支持zip,rar,jar,tar,gzip等压缩包
4. 支持jpg，jpeg，png，gif等图片预览（翻转，缩放，镜像）
5. 使用spring boot开发，预览服务搭建部署非常简便
6. rest接口提供服务，跨平台特性(java,php,python,go,php，....)都支持，应用接入简单方便
7. 抽象预览服务接口，方便二次开发，非常方便添加其他类型文件预览支持
8. 最最重要MIT协议开源，代码pull下来想干嘛就干嘛

快速开始

依赖外部环境

• OpenOffice或者LibreOffice

下载地址如下: 地址①：http://mirrors.ustc.edu.cn/tdf/libreoffice/stable 地址②：https://pan.baidu.com/s/1ZSGCIVXTweK8tbOPudkaQQ 提取码：vn5v

wget http://mirrors.ustc.edu.cn/tdf/libreoffice/stable/6.3.4/rpm/x86_64/LibreOffice_6.3.4_Linux_x86-64_rpm.tar.gz
wget http://mirrors.ustc.edu.cn/tdf/libreoffice/stable/6.3.4/rpm/x86_64/LibreOffice_6.3.4_Linux_x86-64_rpm_langpack_zh-CN.tar.gz

解压

tar xvf LibreOffice_6.3.4_Linux_x86-64_rpm.tar.gz
tar xvf LibreOffice_6.3.4_Linux_x86-64_rpm_langpack_zh-CN.tar.gz

安装

yum install LibreOffice_6.3.4.2_Linux_x86-64_rpm/RPMS/*.rpm
yum install LibreOffice_6.3.4.2_Linux_x86-64_rpm_langpack_zh-CN/RPMS/*.rpm

结合bus-starter项目配套使用

@EnablePreview

具体使用如下：

    @Autowired
    PreviewProviderService previewProviderService;

    @ApiOperation(value = "将传入的文档转换为指定的格式", notes = "文档转换")
    @PostMapping("/index")
    public Object convertToUsingParam(
            @ApiParam(value = "The input document to convert.", required = true)
            @RequestParam("data") final MultipartFile inputFile,
            @ApiParam(value = "The document format to convert the input document to.", required = true)
            @RequestParam(name = "format") final String type,
            @ApiParam(value = "The options to apply to the type.")
            @RequestParam(required = false) final Map<String, String> parameters) {
        Logger.debug("convertUsingRequestParam > Converting file to {}", type);
        if (inputFile.isEmpty()) {
            return write(ErrorCode.EM_100506);
        }

        if (StringUtils.isBlank(convertToFormat)) {
            return write(ErrorCode.EM_100506);
        }

        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            final DocumentFormat targetFormat = DefaultFormatRegistry.getFormatByExtension(type);

            final Map<String, Object> loadProperties = new HashMap<>(LocalOfficeProvider.DEFAULT_LOAD_PROPERTIES);
            final Map<String, Object> storeProperties = new HashMap<>();
            decodeParameters(parameters, loadProperties, storeProperties);

            Provider effectProvider = previewProviderService.get(Registry.LOCAL);
            effectProvider.convert(inputStream)
                    .as(DefaultFormatRegistry.getFormatByExtension(FileUtils.getExtension(filename)))
                    .to(outputStream)
                    .as(targetFormat)
                    .execute();

            final HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.parseMediaType(targetFormat.getMediaType()));
            headers.add(
                    "Content-Disposition",
                    "attachment; filename="
                            + ObjectID.id()
                            + "."
                            + targetFormat.getExtension());

            return ResponseEntity.ok().headers(headers).body(out.toByteArray());
        } catch (InstrumentException | IOException ex) {
            return write(ErrorCode.EM_100506);
        }
    }