jarsigner工具还可以验证一个签名的jar文件，这种操作比签名jar文件要简单得多，只需执行以下命令。
The jarsigner tool can also verify a signed jar file; this operation is considerably simpler than signing the jar file. Just execute the following command.
jarsigner工具使用 keystore 生成或者验证 JAR 文件的数字签名。
The jarsigner tool uses keystore to generate or verify digital signatures for JAR files.
Jarsigner是另一个用于为JAR文件签名并验证签名的实用工具。
Jarsigner is another utility used to sign JAR files and verify such signatures.
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