java 調用openoffice 展示預覽 圖片，doc，word，xmls,txt等靜態資源

import cn.lonwin.rcs.rcscommon.api.ApiResponse;
import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;
import io.swagger.annotations.Api;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.regex.Pattern;

@Api(value = "調用openoffice展示文檔Controller", tags = {"調用openoffice展示文檔"})
@RestController
public class ShowController {

    @RequestMapping(value = "/sys/attach/preview")
    public ApiResponse preview(HttpServletRequest request, HttpServletResponse response, @RequestParam String filePath, @RequestParam String fileName) throws IOException {
       // ResponseData responseData = new ResponseData();
        response.setContentType("text/html; charset=UTF-8");

        if(!"".equals(filePath)) {
            /*1)根據項目所在的服務器環境,確定路徑中的 /  和 \ */
            String osName = System.getProperty("os.name");
            if (Pattern.matches("Linux.*", osName)) {
                filePath = "/" + filePath.replace("\\","/");
            } else if(Pattern.matches("Windows.*", osName)) {
                filePath.replace("/","\\");
            }

            /*2)獲得文件名後綴*/
            String ext = "";
            if(!"".equals(fileName) && fileName.contains(".")){
                ext = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()).toUpperCase();
            }

            /*3)根據文件類型不同進行預覽*/
            /*預覽圖片*/
            if ("PNG".equals(ext) || "JPEG".equals(ext) || "JPG".equals(ext)) {
                response.setContentType("image/jpeg");
            }
            /*預覽BMP格式的文件*/
            if ("BMP".equals(ext)) {
                response.setContentType("image/bmp");
            }
            /*預覽pdf*/
            if ("PDF".equals(ext)) {
                response.setContentType("application/pdf");
            }

            /*利用openOffice將office文件轉換爲pdf格式, 然後預覽doc, docx, xls, xlsx, ppt, pptx */
            if ("DOC".equals(ext) || "DOCX".equals(ext) || "XLS".equals(ext) || "XLSX".equals(ext) || "PPT".equals(ext) || "PPTX".equals(ext)) {
                /*filePath在數據庫中是不帶文件後綴的, 由於jodConverter必須要識別後綴,所以將服務器中的文件重命名爲帶後綴的文件*/
                File docFile = new File(filePath);
                /*File docFileWithExt = new File(filePath + "." + ext.toLowerCase()); //帶後綴的文件
                docFile.renameTo(docFileWithExt);
                */
                /*轉換之後的文件名*/
                File pdfFile;
                if(filePath.contains(".")){
                    pdfFile = new File(filePath.substring(0, filePath.lastIndexOf(".")) + ".pdf");
                }else{
                    pdfFile = new File(filePath + ".pdf");
                }

                /*判斷即將要轉換的文件是否真實存在*/
                if (docFile.exists()) {
                    /*判斷改文件是否已經被轉換過,若已經轉換則直接預覽*/
                    if (!pdfFile.exists()) {
                        /*打開OpenOffice連接,*/
                        OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100);
                        try {
                            connection.connect();
                            DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
                            converter.convert(docFile, pdfFile);
                            connection.disconnect();
                            //文件轉換之後的路徑
                            filePath = pdfFile.getPath();
                            response.setContentType("application/pdf");

                        } catch (java.net.ConnectException e) {
                            e.printStackTrace(); //openoffice 服務未啓動
                            throw e;
                        } catch (com.artofsolving.jodconverter.openoffice.connection.OpenOfficeException e) {
                            e.printStackTrace(); //讀取轉換文件失敗
                            throw e;
                        } catch (Exception e) {
                            e.printStackTrace();
                            throw e;
                        }finally { //發生exception時, connection不會自動切斷, 程序會一直掛着
                            try{
                                if(connection != null){
                                    connection.disconnect();
                                    connection = null;
                                }
                            }catch(Exception e){}
                        }
                    } else {
                        //文件已經轉換過
                        filePath = pdfFile.getPath();
                        response.setContentType("application/pdf");
                    }
                } else {
                    return ApiResponse.error("需要預覽的文檔在服務器中不存在!");
                }
            }

            /*將文件寫入輸出流,顯示在界面上,實現預覽效果*/
            FileInputStream fis = new FileInputStream(filePath);
            OutputStream os = response.getOutputStream();
            try {
                int count = 0;
                byte[] buffer = new byte[1024 * 1024];
                while ((count = fis.read(buffer)) != -1){
                    os.write(buffer, 0, count);
                }
                os.flush();
                return ApiResponse.ok("success",null);
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (os != null){
                    os.close();
                }
                if (fis != null){
                    fis.close();
                }
            }
        }
        return ApiResponse.ok("success",null);
    }

}

註釋 :maven .pom

    **<dependency>
        <groupId>org.openoffice</groupId>
        <artifactId>ridl</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.openoffice</groupId>
        <artifactId>unoil</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>com.thoughtworks.xstream</groupId>
        <artifactId>xstream</artifactId>
        <version>1.4.10</version>
    </dependency>**

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前端調用接口展示
var url = config.apiUrl+"/sys/attach/preview?filePath="+filePath+"&fileName="+fileName;
filepath:爲資源在服務器存放的路徑
filename爲資源的文件名