aip-java-sdk-3.2.1,报错如下 Exception in thread "main" java.lang.NullPointerException at com.baidu.aip.speech.AipSpeech.synthesis(AipSpeech.java:130) 换成aip-java-sdk-3.4.0,报错如下 Exception in thread "main" java.lang.NullPointerException at com.baidu.aip.speech.AipSpeech.synthesis(AipSpeech.java:132)...