【Java】Windows本地执行Jar包数组越界问题

在 上张贴 由 Hydra发表回复

 

入口代码如下：

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@SpringBootApplication
public class SpringDemoApplication implements CommandLineRunner {

private static final String arg = "wooden.businessPlatform.DownloadAndParse";

private final ConfigurableApplicationContext context;

public SpringDemoApplication(ConfigurableApplicationContext context) {
this.context = context;
}

public static void main(String[] args) {
SpringApplication.run(SpringDemoApplication.class, args);
}

public void run(String... args) throws Exception {

if (args != null && args.length != 0) {
System.out.print("Bearer ");
Arrays.stream(args).forEach(System.out::println);
} else {
System.out.println("Please import test token !");
}

Object target = Class.forName("DownloadAndParse").newInstance();
if (target instanceof Executable) {
Executable executable = (Executable) target;
executable.execute(args[0]);
}
context.close();
}

}

 

越界异常如下：

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Exception in thread “main”java.lang.reflect.InvocationTargetException
at sun.reflect.NativellethodAccessorImpl.invoke0(Native ethod)
at sun.reflect.NativellethodAccessorImpl.invoke(Unknow Source)
at sun.reflect.DelegatingllethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.boot.loader.MainllethodRunner.run(MainethodRurner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)
Caused by:java.lang.IllegalStateException:Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.cal1Runner(SpringApplication.java:794)
at org.springframework.boot.SpringApplication.cal1Runners(SpringApplication.java:775)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:345)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332)
at example.SpringDemoApplication.main(SpringDemoApplication.java:31)
... 8 more
Caused by: java.lang.ArrayIndexQutOfBoundsException: 1
at wooden.businessPlatform.metaDataDowmload.MetaDowload.DownloadMethod( letaDownload.java:36)
at wooden.businessPlatform.DownloadAndParse.execute(DownloadAndParse.java:20)
at example.SpringDemoApplication.run(SpringDemoApplication.java:42)
at org.springframework.boot.SpringApplication.cal1Runner(SpringApplication.java:791)
... 13 more

 

一开始以为是入口参数传递问题，后查看日志发现报错源自DownloadMethod.java

Debug之后定位问题为编码不匹配

原因是Jar需要按中文冒号：切割一串字符，取第二个元素

而在Windows cmd执行Jar包时，默认编码不是UTF8

变成乱码之后切割不开，导致数组下标越界

 

所以在WIN执行的时候要带上编码：

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java -jar -Dfile.encoding=utf-8 BizMetaDownAndParse-1.0-SNAPSHOT.jar