idea编译时报错“常量字符串过长”

依次点击 File >> Settings >> Build,Execution,Deployment >> Compiler >>Java Compiler 

 将Use compiler改为eclipse

如果改完后build报错

Error:java: Internal error: 
java.lang.IllegalArgumentException
    at org.eclipse.jdt.internal.compiler.tool.EclipseFileManager.handleOption(EclipseFileManager.java:758)
    at [email protected]/javax.tools.ForwardingJavaFileManager.handleOption(ForwardingJavaFileManager.java:99)
    at org.jetbrains.jps.javac.JpsJavacFileManager.handleOption(JpsJavacFileManager.java:318)

......

 详见https://blog.csdn.net/weixin_43989293/article/details/107157745