使用java代码连接ABAP Netweaver系统

package com.sap.test;

import java.io.FileNotFoundException;

import java.io.IOException;

import org.apache.commons.codec.binary.Base64;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.mime.HttpMultipartMode;

import org.apache.http.entity.mime.MultipartEntityBuilder;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

@SuppressWarnings("deprecation")

public class test

{

    final private static String POST_PREFIX = "https://ag3:44356/sap/crm/zajax?sap-client=001&query=";

    private static String getRequestURL(String str) {

    String url = POST_PREFIX + str;

     url = url + "&sid=" + Math.random();

    return url;

    }

    private static void sendHTTPPostRequest(String str) throws FileNotFoundException {

         HttpClient httpclient = new DefaultHttpClient();

         String raw = "WANGJER:Saptest1";

         String encoded = Base64.encodeBase64String(raw.getBytes());

         HttpPost httppost = new HttpPost(getRequestURL(str));

         MultipartEntityBuilder builder = MultipartEntityBuilder.create();

         builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

         builder.addTextBody("firstName", "Jerry");

         builder.addTextBody("lastName", "Wang");

         try {

                   httppost.addHeader("Content-Type","multipart/form-data; boundary=assdsfdffafasf");

                   httppost.addHeader("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");

                   httppost.addHeader("Authorization", "Basic " + encoded);

                   HttpResponse httpresponse = httpclient.execute(httppost);

                   HttpEntity resEntity = httpresponse.getEntity();

                   String response = EntityUtils.toString(resEntity);

                   System.out.println(response);

           }

           catch (IOException e) {

                   System.out.println(e.getLocalizedMessage());

                   e.printStackTrace();

                   System.out.println("error!");

                   }

             }

      public static void main(String[] args) throws ClientProtocolException, IOException {

             sendHTTPPostRequest("a");

      }

}

错误callstack 如下：

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

at sun.security.ssl.Alerts.getSSLException(Unknown Source)

at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)

at sun.security.ssl.Handshaker.fatalSE(Unknown Source)

at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)

at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)

at sun.security.ssl.Handshaker.processLoop(Unknown Source)

at sun.security.ssl.Handshaker.process_record(Unknown Source)

at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)

at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)

at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)

at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:535)

at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:403)

at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)

at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)

at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)

at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)

at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)

at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)

at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)

at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)

at multipleForm.sendHTTPPostRequest(multipleForm.java:95)

at multipleForm.main(multipleForm.java:110)

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

at sun.security.validator.PKIXValidator.doBuild(Unknown Source)

at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)

at sun.security.validator.Validator.validate(Unknown Source)

at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)

at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)

at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)

… 20 more

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)

at java.security.cert.CertPathBuilder.build(Unknown Source)

… 26 more

error!

使用link

http://code.naishe.in/2011/07/looks-like-article-no-more-unable-to.html

里介绍的方法之后，

问题消失

solution

No more ‘unable to find valid certification path to requested target’.pdf