URLConnections (langx-java 2.8.2 API)

java.lang.Object
- com.jn.langx.util.net.URLConnections

public class URLConnections
extends Object

构造器概要

构造器
构造器和说明

URLConnections()

构造器
构造器和说明
`URLConnections()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static String`	`getContentEncoding(URLConnection conn)` Returns the value of the `content-encoding` header field.
`static int`	`getContentLength(URLConnection conn)` Returns the value of the `content-length` header field.
`static long`	`getContentLengthLong(URLConnection conn)` Returns the value of the `content-length` header field as a long.
`static String`	`getContentType(URLConnection conn)` Returns the value of the `content-type` header field.
`static long`	`getDate(URLConnection conn)` Returns the value of the `date` header field.
`static long`	`getExpiration(URLConnection conn)` Returns the value of the `expires` header field.
`static String`	`getHeaderField(URLConnection conn, String name)`
`static long`	`getHeaderFieldDate(URLConnection conn, String name, long defaultValue)`
`static int`	`getHeaderFieldInt(URLConnection conn, String name, int defaultValue)`
`static long`	`getHeaderFieldLong(URLConnection conn, String name, long defaultValue)`
`static long`	`getLastModified(URLConnection conn)` Returns the value of the `last-modified` header field.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - URLConnections
```
public URLConnections()
```
- 方法详细资料
  - getHeaderFieldLong
```
public static long getHeaderFieldLong(URLConnection conn,
                                      String name,
                                      long defaultValue)
```
  - getHeaderFieldInt
```
public static int getHeaderFieldInt(URLConnection conn,
                                    String name,
                                    int defaultValue)
```
  - getHeaderFieldDate
```
public static long getHeaderFieldDate(URLConnection conn,
                                      String name,
                                      long defaultValue)
```
  - getContentLength
```
public static int getContentLength(URLConnection conn)
```
    Returns the value of the content-length header field.
    Note: getContentLengthLong() should be preferred over this method, since it returns a long instead and is therefore more portable.
    
    返回:
    
    the content length of the resource that this connection's URL references, -1 if the content length is not known, or if the content length is greater than Integer.MAX_VALUE.
  - getContentLengthLong
```
public static long getContentLengthLong(URLConnection conn)
```
    Returns the value of the content-length header field as a long.
    
    返回:
    
    the content length of the resource that this connection's URL references, or -1 if the content length is not known.
  - getContentType
```
public static String getContentType(URLConnection conn)
```
    Returns the value of the content-type header field.
    
    返回:
    
    the content type of the resource that the URL references, or null if not known.
    
    另请参阅:
    
    URLConnection.getHeaderField(String)
  - getContentEncoding
```
public static String getContentEncoding(URLConnection conn)
```
    Returns the value of the content-encoding header field.
    
    返回:
    
    the content encoding of the resource that the URL references, or null if not known.
    
    另请参阅:
    
    URLConnection.getHeaderField(String)
  - getExpiration
```
public static long getExpiration(URLConnection conn)
```
    Returns the value of the expires header field.
    
    返回:
    
    the expiration date of the resource that this URL references, or 0 if not known. The value is the number of milliseconds since January 1, 1970 GMT.
    
    另请参阅:
    
    URLConnection.getHeaderField(String)
  - getDate
```
public static long getDate(URLConnection conn)
```
    Returns the value of the date header field.
    
    返回:
    
    the sending date of the resource that the URL references, or 0 if not known. The value returned is the number of milliseconds since January 1, 1970 GMT.
    
    另请参阅:
    
    URLConnection.getHeaderField(String)
  - getLastModified
```
public static long getLastModified(URLConnection conn)
```
    Returns the value of the last-modified header field. The result is the number of milliseconds since January 1, 1970 GMT.
    
    返回:
    
    the date the resource referenced by this URLConnection was last modified, or 0 if not known.
    
    另请参阅:
    
    URLConnection.getHeaderField(String)
  - getHeaderField
```
public static String getHeaderField(URLConnection conn,
                                    String name)
```

类 URLConnections

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

URLConnections

方法详细资料

getHeaderFieldLong

getHeaderFieldInt

getHeaderFieldDate

getContentLength

getContentLengthLong

getContentType

getContentEncoding

getExpiration

getDate

getLastModified

getHeaderField