Java HttpURLConnection getFollowRedirects() 方法返回此 HttpURLConnection 的 instanceFollowRedirects 字段的值。
声明
以下是 java .net.URLConnection.getInstanceFollowRedirects()方法的声明
public boolean getInstanceFollowRedirects()
参数
无
返回值
HttpURLConnection 的 instanceFollowRedirects 字段的值。
异常
无
示例 1
以下示例显示 Java HttpURLConnection getInstanceFollowRedirects() 方法的用法:使用 https 协议的有效 url。在此示例中,我们将创建 URL 类的实例。使用 url.openConnection() 方法,我们获取 HttpURLConnection 实例。使用 getInstanceFollowRedirects(),我们检查打印相同内容的 instanceFollowRedircts 标志值。现在使用 setInstanceFollowRedirects() 方法,我们更改 instanceFollowRedircts 标志的值并再次打印相同的值 -
package com.yxjc123;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpUrlConnectionDemo {
public static void main(String [] args) {
try {
URL url = new URL("https://www.yxjc123.com/index.htm?language=en#j2se");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
System.out.println("Connected.");
boolean result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.setInstanceFollowRedirects(false);
result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.disconnect();
System.out.println("Disconnected.");
} catch (IOException e) {
e.printStackTrace();
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
输出
Connected.
getInstanceFollowRedirects: true
getInstanceFollowRedirects: false
Disconnected.
示例 2
以下示例显示使用 Java HttpURLConnection getInstanceFollowRedirects() 方法获取具有 http 协议的有效 url。在此示例中,我们将创建 URL 类的实例。使用 url.openConnection() 方法,我们获取 HttpURLConnection 实例。使用 getInstanceFollowRedirects(),我们检查打印相同内容的 instanceFollowRedircts 标志值。现在使用 setInstanceFollowRedirects() 方法,我们更改 instanceFollowRedircts 标志的值并再次打印相同的值 -
package com.yxjc123;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpUrlConnectionDemo {
public static void main(String [] args) {
try {
URL url = new URL("http://www.yxjc123.com/index.htm?language=en#j2se");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
System.out.println("Connected.");
boolean result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.setInstanceFollowRedirects(false);
result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.disconnect();
System.out.println("Disconnected.");
} catch (IOException e) {
e.printStackTrace();
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
输出
Connected.
getInstanceFollowRedirects: true
getInstanceFollowRedirects: false
Disconnected.
示例 2
以下示例显示使用 Java HttpURLConnection getInstanceFollowRedirects() 方法获取具有 http 协议的有效 url。在此示例中,我们将创建 URL 类的实例。使用 url.openConnection() 方法,我们获取 HttpURLConnection 实例。使用 getInstanceFollowRedirects(),我们检查打印相同内容的 instanceFollowRedircts 标志值。现在使用 setInstanceFollowRedirects() 方法,我们更改 instanceFollowRedircts 标志的值并再次打印相同的值 -
package com.yxjc123;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpUrlConnectionDemo {
public static void main(String [] args) {
try {
URL url = new URL("http://www.baidu.com");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
System.out.println("Connected.");
boolean result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.setInstanceFollowRedirects(false);
result = urlConnection.getInstanceFollowRedirects();
System.out.println("getInstanceFollowRedirects: " + result);
urlConnection.disconnect();
System.out.println("Disconnected.");
} catch (IOException e) {
e.printStackTrace();
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
输出
Connected.
getInstanceFollowRedirects: true
getInstanceFollowRedirects: false
Disconnected.