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我想標記命名實體使用斯坦福NER。我的代碼很簡單：斯坦福NER崩潰時從Python調用NLTK
from nltk.tag import StanfordNERTagger
st = StanfordNERTagger('stanford-ner/classifiers/english.all.3class.distsim.crf.ser.gz',
'stanford-ner/stanford-ner.jar',
encoding='utf-8')
st.tag('Rami Eid is studying at Stony Brook University in NY'.split())
但是，我無法讓它工作。我回來的是一個Java例外說：
Exception in thread "main" java.lang.UnsupportedClassVersionError: edu/stanford/nlp/ie/crf/CRFClassifier : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
raise OSError('Java command failed : ' + str(cmd))
OSError: Java command failed : [u'/usr/bin/java', '-mx1000m', '-cp', 'stanford-ner/stanford-ner.jar',
'edu.stanford.nlp.ie.crf.CRFClassifier', '-loadClassifier',
'stanford-ner/classifiers/english.all.3class.distsim.crf.ser.gz', '-textFile', '/tmp/tmpq3u0oi', '-outputFormat', 'slashTags', '-tokenizerFactory',
'edu.stanford.nlp.process.WhitespaceTokenizer',
'-tokenizerOptions', '"tokenizeNLs=false"']
任何想法會導致這次崩潰？先謝謝你。