融合门户
小明:嘿,小华,我们最近在开发的融合服务门户项目需要支持各种文档的上传和查看,特别是Doc文档。你有什么好的建议吗?
小华:当然,我们可以使用一些现有的库来简化这个过程。比如使用Apache POI来处理Doc文档。首先,我们需要一个文件上传的功能。
@PostMapping("/upload")
public ResponseEntity
if (file.isEmpty()) {
return ResponseEntity.badRequest().body("Please select a file to upload");
}
try {
byte[] bytes = file.getBytes();
Path path = Paths.get(UPLOADED_FOLDER + file.getOriginalFilename());
Files.write(path, bytes);
return ResponseEntity.ok("File uploaded successfully: " + file.getOriginalFilename());
} catch (IOException e) {
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Failed to upload file: " + file.getOriginalFilename());
}
}
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小明:这看起来很不错!接下来是如何读取这些文件并展示给用户呢?
小华:我们可以使用Apache POI来读取Doc文件的内容,并将其转换成HTML或其他易于展示的格式。然后,我们还可以将文档处理的状态信息通过统一消息系统通知给用户。
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
public String readDocFile(String filePath) throws IOException {
StringBuilder content = new StringBuilder();
try (XWPFDocument document = new XWPFDocument(new FileInputStream(filePath))) {

for (XWPFParagraph paragraph : document.getParagraphs()) {
content.append(paragraph.getText()).append("\n");
}
}
return content.toString();
}
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小明:那如果用户想要实时了解文档的处理状态呢?
小华:我们可以通过统一消息系统(如RabbitMQ或Kafka)来发送文档处理的状态更新。这样用户可以随时收到最新的消息。
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public void sendMessage(String message) throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
try (Connection connection = factory.newConnection(); Channel channel = connection.createChannel()) {
channel.queueDeclare("documentProcessingStatus", false, false, false, null);

channel.basicPublish("", "documentProcessingStatus", null, message.getBytes());
System.out.println(" [x] Sent '" + message + "'");
}
}
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