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zbj//1.预览资源 todo未完成

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zhangbaojian
2023-05-26 10:59:46 +08:00
parent e88b0e6e1b
commit ffe71537f7
3 changed files with 140 additions and 24 deletions
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31
pqs-device/pq-device/pq-device-boot/src/main/java/com/njcn/device/pq/controller/ResourceController.java
View File

@@ -22,6 +22,7 @@ import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@@ -57,6 +58,7 @@ public class ResourceController extends BaseController {
/**
* 查询数据
*
* @return List<ResourceData>
*/
@OperateInfo(info = LogEnum.BUSINESS_COMMON)
@@ -68,6 +70,20 @@ public class ResourceController extends BaseController {
return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, result, methodDescribe);
}
/**
* 预览资源
*/
//todo 未完成
@OperateInfo(info = LogEnum.BUSINESS_COMMON)
@GetMapping("/previewFile")
@ApiOperation("预览资源")
@ApiImplicitParam(name = "id", value = "id", required = true)
public HttpResult<Object> previewFile(@RequestParam("id") String id, HttpServletRequest request, HttpServletResponse response) throws IOException {
String methodDescribe = getMethodDescribe("downloadFile");
iResourceAdministrationService.previewFile(id, request, response);
return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, "成功", methodDescribe);
}
/**
* 修改资源
*//*
@@ -98,20 +114,9 @@ public class ResourceController extends BaseController {
return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, flag, methodDescribe);
}
*//**
* 下载资源
*//*
@OperateInfo(info = LogEnum.BUSINESS_COMMON)
@GetMapping("/downloadFile")
@ApiOperation("下载资源")
@ApiImplicitParam(name = "id",value = "id",required = true)
public HttpResult<Object> downloadFile(@RequestParam("id")String id, HttpServletResponse response) throws IOException {
String methodDescribe = getMethodDescribe("downloadFile");
iResourceAdministrationService.downloadFile(id,response);
return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, "下载成功", methodDescribe);
}
*//**
/**
* 导出数据
*//*
*//*@OperateInfo(info = LogEnum.BUSINESS_COMMON)

6
pqs-device/pq-device/pq-device-boot/src/main/java/com/njcn/device/pq/service/ResourceService.java
View File

@@ -7,6 +7,7 @@ import com.njcn.device.pq.pojo.vo.MonitoringPointScaleVO;
import com.njcn.system.pojo.po.Resinformation;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@@ -22,12 +23,15 @@ public interface ResourceService extends IService<ResourceData> {
Boolean uploadFile(MultipartFile multipartFile, MultipartFile picture, String name, Integer type);
List<ResourceData> queryData();
void previewFile(String id, HttpServletRequest request, HttpServletResponse response) throws IOException;
/*
Boolean updateFile(MultipartFile multipartFile, String id, String name, String type, String description, String systemType);
Boolean deleteFile(String id);
void downloadFile(String id, HttpServletResponse response) throws IOException;
void exportData();*/
}

127
pqs-device/pq-device/pq-device-boot/src/main/java/com/njcn/device/pq/service/impl/ResourceServiceImpl.java
View File

@@ -26,9 +26,9 @@ import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.*;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
@@ -60,7 +60,7 @@ public class ResourceServiceImpl extends ServiceImpl<ResourceMapper, ResourceDat
resUrl = fileStorageUtil.uploadMultipart(multipartFile, OssPath.RESOURCEDATA);
//判断图片文件对象是否为空,不为空获取图片路径
if (null != picture && !picture.isEmpty()) {
picUrl = fileStorageUtil.uploadMultipart(picture, OssPath.RESOURCEDATA);
picUrl = fileStorageUtil.uploadMultipart(picture, OssPath.RESOURCEDATA);
}
//创建对象
ResourceData resourceData = new ResourceData();
@@ -76,8 +76,120 @@ public class ResourceServiceImpl extends ServiceImpl<ResourceMapper, ResourceDat
@Override
public List<ResourceData> queryData() {
return this.list();
List<ResourceData> list = this.list();
for (ResourceData resourceData : list) {
if (StringUtils.isNotBlank(resourceData.getPicUrl())) {
resourceData.setPicUrl(fileStorageUtil.getFileUrl(resourceData.getPicUrl()));
}
}
return list;
}
public static long getFileSize(InputStream inputStream) throws IOException {
byte[] buffer = new byte[1024];
int len;
long size = 0;
while ((len = inputStream.read(buffer)) != -1) {
size += len;
}
inputStream.close();
return size;
}
@Override
public void previewFile(String id, HttpServletRequest request, HttpServletResponse response) throws IOException {
ResourceData resourceData = resourceMapper.selectById(id);
//获取文件流
InputStream ins = fileStorageUtil.getFileStream(resourceData.getResUrl());
if (StringUtils.isNotBlank(resourceData.getPicUrl())) {
resourceData.setPicUrl(fileStorageUtil.getFileUrl(resourceData.getPicUrl()));
}
try (
BufferedInputStream bis = new BufferedInputStream(ins);
OutputStream out = response.getOutputStream()) {
long p = 0L;
long toLength = 0L;
long contentLength = 0L;
int rangeSwitch = 0;
long fileLength;
String rangBytes = "";
fileLength = getFileSize(ins);
// get file content
// tell the client to allow accept-ranges
response.reset();
response.setHeader("Accept-Ranges", "bytes");
// client requests a file block download start byte
String range = request.getHeader("Range");
if (range != null && range.trim().length() > 0 && !"null".equals(range)) {
response.setStatus(javax.servlet.http.HttpServletResponse.SC_PARTIAL_CONTENT);
rangBytes = range.replaceAll("bytes=", "");
if (rangBytes.endsWith("-")) { // bytes=270000-
rangeSwitch = 1;
p = Long.parseLong(rangBytes.substring(0, rangBytes.indexOf("-")));
contentLength = fileLength - p; // 客户端请求的是270000之后的字节(包括bytes下标索引为270000的字节)
} else { // bytes=270000-320000
rangeSwitch = 2;
String temp1 = rangBytes.substring(0, rangBytes.indexOf("-"));
String temp2 = rangBytes.substring(rangBytes.indexOf("-") + 1, rangBytes.length());
p = Long.parseLong(temp1);
toLength = Long.parseLong(temp2);
contentLength = toLength - p + 1; // 客户端请求的是 270000-320000 之间的字节
}
} else {
contentLength = fileLength;
}
// 如果设设置了Content-Length，则客户端会自动进行多线程下载。如果不希望支持多线程，则不要设置这个参数。
// Content-Length: [文件的总大小] - [客户端请求的下载的文件块的开始字节]
response.setHeader("Content-Length", Long.toString(contentLength));
// 断点开始
// 响应的格式是:
// Content-Range: bytes [文件块的开始字节]-[文件的总大小 - 1]/[文件的总大小]
if (rangeSwitch == 1) {
String contentRange = new StringBuffer("bytes ").append(new Long(p).toString()).append("-")
.append(new Long(fileLength - 1).toString()).append("/")
.append(new Long(fileLength).toString()).toString();
response.setHeader("Content-Range", contentRange);
bis.skip(p);
} else if (rangeSwitch == 2) {
String contentRange = range.replace("=", " ") + "/" + new Long(fileLength).toString();
response.setHeader("Content-Range", contentRange);
bis.skip(p);
} else {
String contentRange = new StringBuffer("bytes ").append("0-").append(fileLength - 1).append("/")
.append(fileLength).toString();
response.setHeader("Content-Range", contentRange);
}
String fileName = resourceData.getResourceName();
response.setContentType("application/octet-stream");
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
int n = 0;
long readLength = 0;
int bsize = 1024;
byte[] bytes = new byte[bsize];
if (rangeSwitch == 2) {
// 针对 bytes=27000-39000 的请求，从27000开始写数据
while (readLength <= contentLength - bsize) {
n = bis.read(bytes);
readLength += n;
out.write(bytes, 0, n);
}
if (readLength <= contentLength) {
n = bis.read(bytes, 0, (int) (contentLength - readLength));
out.write(bytes, 0, n);
}
} else {
while ((n = bis.read(bytes)) != -1) {
out.write(bytes, 0, n);
}
}
out.flush();
} catch (Exception e) {
log.error(e.getMessage());
}
//return resourceData;
}
/*
@Override
public Boolean updateFile(MultipartFile multipartFile, String id, String name, String type, String description, String systemType) {
@@ -116,12 +228,7 @@ public class ResourceServiceImpl extends ServiceImpl<ResourceMapper, ResourceDat
return i > 0;
}
@Override
public void downloadFile(String id, HttpServletResponse response) throws IOException {
Resinformation resinformation = resourceAdministrationMapper.selectById(id);
//下载文件
fileStorageUtil.downloadStream(response, resinformation.getUrl());
}
@Override
public void exportData() {