Java 中的 URI getAuthority()方法，带示例
原文:https://www . geesforgeks . org/uri-getauthority-method-in-Java-with-examples/
getAuthority() 函数是 URI 类的一部分。函数 getAuthority()返回指定 URI 的权限。网址的权威部分是 URI 的主机名和端口。
功能签名
public String getAuthority()
语法 :
url.getAuthority()
参数该功能不需要任何参数
返回类型该函数返回字符串类型，这是指定网址的权限。
下面的程序说明了 getRawAuthority()函数的使用:
例 1:
// Java program to show the
// use of the function getAuthority()
import java.net.*;
class GFG {
public static void main(String args[])
{
// URI object
URI uri = null;
try {
// create a URI
uri
= new URI(
"https://www.geeksforgeeks.org");
// get the Authority
String authority
= uri.getAuthority();
// display the URI
System.out.println("URI = " + uri);
// display the Authority
System.out.println("Authority = "
+ authority);
}
// if any error occurs
catch (Exception e) {
// display the error
System.out.println(e);
}
}
}
输出:
URI = https://www.geeksforgeeks.org
Authority = www.geeksforgeeks.org
示例 2:getAuthority()和 getHost()函数的区别在于 getAuthority()返回主机和端口，而 getHost()只返回主机名。
// Java program to show the
// use of the function getAuthority()
import java.net.*;
class GFG {
public static void main(String args[])
{
// url object
URI uri = null;
try {
// create a URI
uri
= new URI(
"https://www.geeksforgeeks.org:80");
// get the Authority
String authority
= uri.getAuthority();
// get the Host
String host = uri.getHost();
// display the URI
System.out.println("URI = " + uri);
// display the Authority
System.out.println("Authority = "
+ authority);
// display the Host
System.out.println("Host = " + host);
}
// if any error occurs
catch (Exception e) {
// display the error
System.out.println(e);
}
}
}
输出:
URI = https://www.geeksforgeeks.org:80
Authority = www.geeksforgeeks.org:80
Host = www.geeksforgeeks.org
示例 3:getAuthority()和 getRawAuthority()返回的值是相同的，只是转义八位字节的所有序列都被解码。getRawAuthority()返回用户提供的字符串的确切值，但是 getAuthority()函数解码转义八位字节序列(如果有)。
// Java program to show the
// use of the function getAuthority()
import java.net.*;
class GFG {
public static void main(String args[])
{
// url object
URI uri = null;
try {
// create a URI
uri
= new URI(
"https://www.geeksforgeeks%E2%82%AC.org:80");
// get the Authority
String authority
= uri.getAuthority();
// get the Raw Authority
String Raw_authority
= uri.getRawAuthority();
// display the URI
System.out.println("URI = " + uri);
// display the Authority
System.out.println("Authority = "
+ authority);
// display the Raw Authority
System.out.println("Raw Authority = "
+ Raw_authority);
}
// if any error occurs
catch (Exception e) {
// display the error
System.out.println(e);
}
}
}
输出:
URI = https://www.geeksforgeeks%E2%82%AC.org:80
Authority = www.geeksforgeeks?.org:80
Raw Authority = www.geeksforgeeks%E2%82%AC.org:80
]
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