Java读取网络文件的实例代码
目录
- Java读取网络文件
- 输入url地址读取txt文件
- Java读取网络文件问题 protocol = http host = null
- 通过ip地址读取文件
Java读取网络文件
输入url地址读取txt文件
/**
* Created by qqg on 2018/1/3.
*/
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
public class w{
private static String openFile(String filePath) {
int HttpResult; // 服务器返回的状态
String ee = new String();
try
{
URL url =new URL(filePath); // 创建URL
URLConnection urlconn = url.openConnection(); // 试图连接并取得返回状态码
urlconn.connect();
HttpURLConnection httpconn =(HttpURLConnection)urlconn;
HttpResult = httpconn.getResponseCode();
if(HttpResult != HttpURLConnection.HTTP_OK) {
System.out.print("无法连接到");
} else {
int filesize = urlconn.getContentLength(); // 取数据长度
InputStreamReader isReader = new InputStreamReader(urlconn.getInputStream(),"UTF-8");
BufferedReader reader = new BufferedReader(isReader);
StringBuffer buffer = new StringBuffer();
String line; // 用来保存每行读取的内容
line = reader.readLine(); // 读取第一行
while (line != null) { // 如果 line 为空说明读完了
buffer.append(line); // 将读到的内容添加到 buffer 中
buffer.append(" "); // 添加换行符
line = reader.readLine(); // 读取下一行
}
System.out.print(buffer.toString());
ee = buffer.toString();
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return ee;
}
public static void main(String[] args){ System.out.print(w.openFile("http://******/hrmsstatic/SensitiveWord.txt"));
}
}
Java读取网络文件问题 protocol = http host = null
通过ip地址读取文件
public void testReadFile() {
try {
URL url = new URL("http://172.31.77.220:8080/data/files/F_000001/F_000001_10743.xlsx");
URLConnection openConnection = url.openConnection();
InputStream inputStream = openConnection.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
}
protocol = http host = null错误
上述代码写成
URL url = new URL("http:/172.31.77.220:8080/data/files/F_000001/F_000001_10743.xlsx");
这样会报这个错误
应该是双斜杠才正确
以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。
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