英文:
How to use a for-loop to go through the lines in a txt file Java
问题
基本上我试图做的是用Java制作一个能够向网站发送POST请求的程序，但每次请求时都会使用不同的令牌（token）。我有一个文件，里面充满了这些“令牌”称为tokens.txt，我希望程序能够遍历每个令牌，为每个令牌发送一个请求。过去我在Python中做过类似的事情：
String link = "https://example.com";
int joined = 0;
int failed = 0;
try (BufferedReader br = new BufferedReader(new FileReader("tokens.txt"))) {
String token;
while ((token = br.readLine()) != null) {
String json = ""; // You need to construct your JSON payload here
HttpURLConnection connection = (HttpURLConnection) new URL(link).openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11");
connection.setRequestProperty("Authorization", token);
connection.setDoOutput(true);
try (OutputStream os = connection.getOutputStream()) {
byte[] input = json.getBytes("utf-8");
os.write(input, 0, input.length);
}
int response = connection.getResponseCode();
if (response >= 200 && response < 300) {
joined++;
} else {
failed++;
}
}
} catch (IOException e) {
e.printStackTrace();
}
如你在Python代码中所见，这段Java代码会遍历文件并在每次迭代中改变令牌变量，并发送请求。
然而，由于我对Java还比较新，不太清楚我在做什么，感到有些困惑。
英文:
Basically what I am trying to do is make something in java that will send POST requests to a website, but with a different token each time. I have a file full of these "tokens" called tokens.txt and I want it to loop through these for each request so that it sends a request for each token. I have done something like this in the past in python:
link = "https://example.com"
joined = 0
failed = 0
with open("tokens.txt", "r") as f:
tokens = f.read().splitlines()
for token in tokens:
headers = {"Content-Type": "application/json",
"User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11",
"Authorization" : token}
response = post(link, headers=headers).status_code
if response > 199 and response < 300:
joined += 1
else:
failed += 1
As you can see in the python code, It loops through the file changing the token variable and sending the request
However, I am fairly new to java so I don't know what I am doing and I am confused.
答案1
得分: 0
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
public class Main {
public static void main(String[] args) {
int joined = 0, failed = 0;
try {
URL url = new URL("https://example.com");
Path path = Paths.get("tokens.txt");
List<String> tokens = Files.readAllLines(path, StandardCharsets.UTF_8);
for (String token : tokens) {
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11");
connection.setRequestProperty("Authorization", token);
int response = connection.getResponseCode();
if (response > 199 && response < 300)
joined++;
else
failed++;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
英文:
Since you want to use a for-loop try this:
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
public class Main {
public static void main(String[] args) {
int joined = 0, failed = 0;
try {
URL url = new URL("https://example.com");
Path path = Paths.get("tokens.txt");
List<String> tokens = Files.readAllLines(path, StandardCharsets.UTF_8);
for (String token : tokens) {
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11");
connection.setRequestProperty("Authorization", token);
int response = connection.getResponseCode();
if (response > 199 && response < 300)
joined++;
else
failed++;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
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