我尝试登录我校的成绩簿网站,使用以下代码显示HTML:
public class Connect {
public static void main(String[] args) {
String pageURL = "https://parents.mtsd.k12.nj.us/genesis/parents?tab1=studentdata&action=form";
String param1 = "&tab2=gradebook";
String param2 = "&tab3=weeklysummary";
String param3 = "&studentid=";
Scanner input = new Scanner (System.in);
String initURL = "https://parents.mtsd.k12.nj.us/genesis/parents?gohome=true";
//System.out.print("Enter Student ID: ");
//String sID = input.nextLine();
String sID = "not shown";
String URLF = pageURL + param1 + param2 + param3 + sID;
connectTo(URLF);
// write your code here
}
public static Document connectTo (String URLF){
String loginURL = "https://parents.mtsd.k12.nj.us/genesis/parents/j_security_check";
String userDataUrl = URLF;
String username = "not shown";
String password = "not shown";
Connection.Response res = null;
Document doc = null;
try {
res = Jsoup.connect(userDataUrl)
.userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.4 Safari/537.36")
.header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
.timeout(500)
.method(Connection.Method.GET)
.execute();
} catch (IOException io) {
io.printStackTrace();
}
try {
doc = Jsoup.connect(loginURL)
.userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.4 Safari/537.36")
.referrer("https://parents.mtsd.k12.nj.us/genesis/parents?gohome=true")
.cookies(res.cookies())
.data("j_username", username)
.data("j_password", password)
.post();
} catch (IOException ioe) {
ioe.printStackTrace();
}
if (doc != null){
System.out.print(doc.text());
}
return null;
}
}
但是,当我运行它时,我收到以下错误:
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(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1506)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDele gateHttpsURLConnection.java:185)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:512)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:493)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:205)
at com.gs.Connect.connectTo(Connect.java:58)
at com.gs.Connect.main(Connect.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:146)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
... 26 more
Exception in thread "main" java.lang.NullPointerException
at com.gs.Connect.connectTo(Connect.java:71)
at com.gs.Connect.main(Connect.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
现在,我不确定为什么这不起作用,因为我一直在使用这个类似的过程(使用Jsoup)来登录/解析来自类似网站的信息,而且我还没有遇到任何问题。任何帮助表示赞赏!
答案 0 :(得分:3)
execpetion unable to find valid certification path to requested target
的起源的简短说明。
只有在信任证书的情况下,Java才会通过SSL建立安全连接。信任的证书存储在信任库$ {JAVA_HOME} / lib / security / cacerts中。信任库包含众所周知的证书颁发机构(CA)列表。如果远程服务器的证书既未由信任任务中的某个CA签名,也未由远程服务器本身的证书在信任中进行签名,则该连接将不受信任,并且会抛出SunCertPathBuilderException
。
在这种情况下,证书由GoDaddy.com
签署,该your_keystore.jks
不在Java信任中。因此,必须手动将服务器证书添加到默认Java信任库或单独的https://parents.mtsd.k12.nj.us
版本中。
以下步骤说明如何下载服务器证书并将其存储在separat密钥库中。然后,此密钥库将用于验证服务器证书。
默认情况下不要为所有Java不受信任的连接执行此操作。在您这样做之前,您必须确保您连接的服务器是您要连接的服务器。
首先,您需要下载该网页的证书。
E.g。使用Chrome浏览器(针对Linux描述的步骤,Windows类似,OSX检查下面的评论):
https://
Connection
之前)Certificate information
Certificate Viewer
details
点击标签Export
BASE 64 encoded single certificate
并以[{1}}格式将证书保存为文件owa.mtsd.us.b64
(可以是任何其他文件名)接下来创建一个密钥库文件(一个命令行)
keytool -import -noprompt -trustcacerts \
-alias owa.mtsd.us -file owa.mtsd.us.b64 \
-keystore your_keystore.jks -storepass YourPasswd
以下代码段成功建立了连接
// without setting your created keystore
// a sun.security.validator.ValidatorException will be thrown
System.setProperty("javax.net.ssl.trustStore", "your_keystore.jks");
String url = "https://parents.mtsd.k12.nj.us";
Document doc = Jsoup.connect(url).get();
System.out.println("doc = " + doc.text());
输出
doc = One Moment...