
byte[] bytes = data.getBytes(StandardCharsets.UTF_8);
解决办法:修改Project Structure的Language level

maven配置java的版本解决:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
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