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java使用URLEncoder、URLDecoder进行URL参数的转码与解码

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url后参数的转码与解码

 

import java.net.URLDecoder;
import java.net.URLEncoder;

 

 

  String strTest = "?=abc?中%1&2<3,4>";
  strTest = URLEncoder.encode(strTest, "UTF-8");
  System.out.println(strTest);
  strTest = URLDecoder.decode(strTest,"UTF-8");
  System.out.println(strTest);

 

 

执行结果：

%3F%3Dabc%3F%E4%B8%AD%251%262%3C3%2C4%3E
?=abc?中%1&2<3,4>

 

 

 

jdk相关说明：

String java.net. URLEncoder.encode( String s, String enc) throws UnsupportedEncodingException

Translates a string into application/x-www-form-urlencoded format using a specific encoding scheme. This method uses the supplied encoding scheme to obtain the bytes for unsafe characters.

Note: The World Wide Web Consortium Recommendation states that UTF-8 should be used. Not doing so may introduce incompatibilites.

Parameters:

s String to be translated.

enc The name of a supported character encoding.

Returns:

the translated String.

Throws:

UnsupportedEncodingException - If the named encoding is not supported

Since:

1.4

See Also:

URLDecoder.decode(java.lang.String, java.lang.String)

 

String java.net. URLDecoder.decode( String s, String enc) throws UnsupportedEncodingException

Decodes a application/x-www-form-urlencoded string using a specific encoding scheme. The supplied encoding is used to determine what characters are represented by any consecutive sequences of the form "%xy".

Note: The World Wide Web Consortium Recommendation states that UTF-8 should be used. Not doing so may introduce incompatibilites.

Parameters:

s the String to decode

enc The name of a supported character encoding.

Returns:

the newly decoded String

Throws:

UnsupportedEncodingException - If character encoding needs to be consulted, but named character encoding is not supported

Since:

1.4

See Also:

URLEncoder.encode(java.lang.String, java.lang.String)