我在jetty服务器上使用ANT编译新的。war文件时也遇到了同样的问题。在你必须像之前写的那样设置Java compiler之后，你应该创建相同版本的jdk/jre编译器和构建路径(例如jdk 1.6v33, jdk 1.7， ....)。

我什么都做了，还是没工作。解决方案是删除已编译的.class文件和生成的war文件的目标，现在它的工作:)

当我用@ManagedBean (javax.annotation.ManagedBean)注释类时，我发现了这个问题。在JBoss EAP 6.2.0上运行新编译的应用程序时出现警告消息。忽略它并继续运行并没有帮助——断点从未到达。

我在JSF页面中使用EL调用该bean。现在…@ManagedBean可能不适合(我是CDI的新手)。当我将注释更改为@Model时，bean执行了，但断点警告也消失了，我像预期的那样击中了断点。

总之，看起来@ManagedBean注释弄乱了行号，不管它是否使用了错误的注释。

这里有详细的解释:

https://github.com/spring-projects/spring-ide/issues/78

只是为了将来参考，这是答案的相关部分(忽略引用Spring Boot应用程序的事实，在许多其他情况下行为是相同的):

Whenever you set a breakpoint in Eclipse/STS, the IDE tries to set the breakpoint in the VM if you launch an app. That is what happens in your case when you run the boot app in debug mode. For each class that gets loaded into the JVM, the IDE checks whether it needs to set a breakpoint or not. If it decides to set the breakpoint, the tries to do so (using the information from the breakpoint definition in the IDE, including its line number, since you usually set line breakpoints on a source file at a given line). This decision (whether to set the breakpoint on a given loaded class or not) checks the types that you set the breakpoint on, enclosing types, and inner classes. This makes sure that breakpoints for inner classes (even anonymous inner classes) are set to the JVM (and are not ignored). Spring Boot generates an inner class for your controller at runtime (this is the CGLIB generated inner class that appears in the error message). When the JVM loads that class, it tries to set the line number breakpoint of the enclosing type (for this inner class). Since the generated inner class doesn't have any line number information (it doesn't need to have line number information), setting the breakpoint fails for this inner class with the mentioned error message. When the IDE loads the enclosing type (your controller class itself), it also tries to set the line breakpoint and succeeds with that. This is visualized with the check marker on the breakpoint marker. Therefore you can safely ignore the error message that shows up. To avoid this error message to show up, you can go to the preferences (Java -> Debug) and disable "Warn when unable to install breakpoint due to missing line number attributes".

我在jetty服务器上使用ANT编译新的。war文件时也遇到了同样的问题。在你必须像之前写的那样设置Java compiler之后，你应该创建相同版本的jdk/jre编译器和构建路径(例如jdk 1.6v33, jdk 1.7， ....)。

我什么都做了，还是没工作。解决方案是删除已编译的.class文件和生成的war文件的目标，现在它的工作:)

如果上述解决方案不起作用，并且你在做了spring bean注入后开始遇到这个问题，问题可能是你没有为注入类使用接口。尝试使用实现接口的类进行注入可以解决这个问题。下面是一个例子: 无法安装用于创建bean的断点问题

如果其他方法都不起作用，打开调试透视图，清除所有现有的断点，然后重新设置它们。