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java 的关于web serive教程

This is a simple example of generating an Enveloped XML
Signature using the JSR 105 API. The resulting signature will look
like (key and signature values will be different):

<Envelope xmlns="urn:envelope">
 <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
   <SignedInfo>
     <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
       <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#dsa-sha1"/>
       <Reference URI="">
         <Transforms>
           <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
	 </Transforms>
	 <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
	 <DigestValue>K8M/lPbKnuMDsO0Uzuj75lQtzQI=<DigestValue>
       </Reference>
     </SignedInfo>
     <SignatureValue>
 	DpEylhQoiUKBoKWmYfajXO7LZxiDYgVtUtCNyTgwZgoChzorA2nhkQ==
     </SignatureValue>
     <KeyInfo>
       <KeyValue>
	 <DSAKeyValue>
	  <P>
	    rFto8uPQM6y34FLPmDh40BLJ1rVrC8VeRquuhPZ6jYNFkQuwxnu/wCvIAMhukPBL
	    FET8bJf/b2ef+oqxZajEb+88zlZoyG8g/wMfDBHTxz+CnowLahnCCTYBp5kt7G8q
	    UobJuvjylwj1st7V9Lsu03iXMXtbiriUjFa5gURasN8=
	  </P>
	  <Q>
	    kEjAFpCe4lcUOdwphpzf+tBaUds=
	  </Q>
	  <G>
	    oe14R2OtyKx+s+60O5BRNMOYpIg2TU/f15N3bsDErKOWtKXeNK9FS7dWStreDxo2
	    SSgOonqAd4FuJ/4uva7GgNL4ULIqY7E+mW5iwJ7n/WTELh98mEocsLXkNh24HcH4
	    BZfSCTruuzmCyjdV1KSqX/Eux04HfCWYmdxN3SQ/qqw=
	  </G>
	  <Y>
	    pA5NnZvcd574WRXuOA7ZfC/7Lqt4cB0MRLWtHubtJoVOao9ib5ry4rTk0r6ddnOv
	    AIGKktutzK3ymvKleS3DOrwZQgJ+/BDWDW8kO9R66o6rdjiSobBi/0c2V1+dkqOg
	    jFmKz395mvCOZGhC7fqAVhHat2EjGPMfgSZyABa7+1k=
          </Y>
        </DSAKeyValue>
      </KeyValue>
    </KeyInfo>
  </Signature>
</Envelope>

Also, the signature above is formatted with indents and line breaks for readability.

Command Line Usage:

  To compile and run this sample, execute the following command:

  $ export JWSDP_HOME=<pathname of JWSDP>
  $ $JWSDP_HOME/apache-ant/bin/ant 

  This will generate an enveloped signature of the document in envelope.xml 
  and store it in the file envelopedSignature.xml in the current working 
  directory.