NoClassDefFoundError语言 - SSLSocketFactory

Question

在运行我的junit时遇到此异常。当我使用verbose运行JUnit时，我看到类是从正确的jar加载的。看起来它没有初始化。为什么？

org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.apache.http.conn.ssl.SSLSocketFactory
    at org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1302)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:977)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:859)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844)
    at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
    at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167)
    at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
    at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:155)

Answer 1

java.lang.NoClassDefFoundError:无法初始化类org.apache.http.conn.ssl.SSLSocketFactory

这就是它所说的。在某个时刻，JVM试图初始化该类，但失败了。某个地方应该有一个异常堆栈，说明失败的实际原因。这很可能是由于某些类的静态初始化程序中/内部引发了未检查的异常。没有堆叠跑道。我们只能猜测真正的原因是什么。