使用httpclient 出现各种错误，高版本低版本都试了，错误都一样，就是类不一样，我想知道这到底是怎么回事
搞了两三天了没解。大神们。。。。给个思路啊。。。jar包冲突我也试了好多遍了都不行啊。
Caused by: java.lang.NoSuchFieldError: INSTANCE
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:52)
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:56)
Caused by: java.lang.NoSuchFieldError: INSTANCE
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:144)
at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:912)
at com.asiainfo.ica.lolth.fetcher.fetch.impl.FetcherStatic.<init>(FetcherStatic.java:75)
遇到了问题了 java.lang.NoSuchFieldError:INSTANE
原文：http://my.oschina.net/u/2329222/blog/523150