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我正在运行这个Java + SSL Tutorial，但出现以下错误。

main, handling exception: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
    at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
    at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source)
    at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
    at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
    at sun.nio.cs.StreamDecoder.read(Unknown Source)
    at java.io.InputStreamReader.read(Unknown Source)
    at java.io.BufferedReader.fill(Unknown Source)
    at java.io.BufferedReader.readLine(Unknown Source)
    at java.io.BufferedReader.readLine(Unknown Source)
    at EchoServer.main(EchoServer.java:24)

代码中发生异常的行在这里：

        while ((string = bufferedreader.readLine()) != null) {

我在这里做错了什么？自编写该示例以来情况是否发生了变化？

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1 回答 1

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由于某种原因，您的证书可能无效（或未加载）。启用调试模式应该可以帮助您找到更多问题

System.setProperty("javax.net.debug", "all");

此外，如果您使用自签名证书，请查看：http ://ctasada.blogspot.com.es/2010/11/httpclient-use-self-signed-certificates.html

于 2012-04-24T21:05:56.937 回答