有什么办法可以转换这样的请求：
"Annotation text="President Obama called Wednesday on Congress to extend a tax break
for students included in last year's economic stimulus package, arguing that the policy
provides more generous assistance."
confidence="0.2" support="20"
sparql="SELECT DISTINCT ?x WHERE { ?x a <http://dbpedia.org/ontology/OfficeHolder>; .
?x ?related <http://dbpedia.org/resource/Chicago>; }"
policy="whitelist"
变成这个？
http://spotlight.dbpedia.org/rest/annotate?text=President%20Obama%20called%20Wednesday%20on%20Congress%20to%20extend%20a%20tax%20break%20for%20students%20included%20in%20last%20year%27s%20economic%20stimulus%20package,%20arguing%20that%20the%20policy%20provides%20more%20generous%20assistance.&confidence=0.2&support=20&sparql=SELECT+DISTINCT+%3Fx%0D%0AWHERE+%7B%0D%0A%3Fx+a+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2FOfficeHolder%3E+.%0D%0A%3Fx+%3Frelated+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FChicago%3E+.%0D%0A%7D
我知道空格等于％20，但我不知道其他转换。
有没有可以进行转换的Java库？
最佳答案
使用
URLEncoder.encode(textAfterQuestionMark);