.java.lang.VerifyError: class com.google.protobuf.LiteralByteString overrides final method toString.(Ljava/lang/String;)Ljava/lang/String;找到关键字protobuf，猜测的原因是hbase的依赖包冲突，于是先将hbase里的包排除，再降低版本引入
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>2.5.0</version>
</dependency><dependency>
<groupId>org.apache.phoenix</groupId>
<artifactId>phoenix-spark</artifactId>
<version>5.0.0-HBase-2.0</version>
<exclusions>
<exclusion>
<groupId>org.glassfish</groupId>
<artifactId>javax.el</artifactId>
</exclusion>
<exclusion>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>2.5.0</version>
</dependency>此外注意的是stringbuffer对字符串进行修改后必须赋值才能生成对象，否则不能获取修改后的字符串。