弹簧启动 10 系统属性'file.encoding'

Question

我正在尝试使用以下命令启动Spring Boot uber jar：

java -jar api-0.0.1.jar -Dfile.encoding=UTF-8

但它失败并显示以下错误：

07:52:54.573 [main] INFO com.example.domain.api.Application - Starting application...
2017-08-01 07:52:55.071 ERROR 5792 --- [           main] o.s.b.c.FileEncodingApplicationListener  : System property 'file.encoding' is currently '
Cp1251'. It should be 'UTF-8' (as defined in 'spring.mandatoryFileEncoding').
2017-08-01 07:52:55.074 ERROR 5792 --- [           main] o.s.b.c.FileEncodingApplicationListener  : Environment variable LANG is 'null'. You could
use a locale setting that matches encoding='UTF-8'.
2017-08-01 07:52:55.075 ERROR 5792 --- [           main] o.s.b.c.FileEncodingApplicationListener  : Environment variable LC_ALL is 'null'. You cou
ld use a locale setting that matches encoding='UTF-8'.
2017-08-01 07:52:55.082 ERROR 5792 --- [           main] o.s.boot.SpringApplication               : Application startup failed
java.lang.IllegalStateException: The Java Virtual Machine has not been configured to use the desired default character encoding (UTF-8).
at org.springframework.boot.context.FileEncodingApplicationListener.onApplicationEvent(FileEncodingApplicationListener.java:74) ~[spring-b
oot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.boot.context.FileEncodingApplicationListener.onApplicationEvent(FileEncodingApplicationListener.java:46) ~[spring-b
oot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) ~[spring
-context-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring
-context-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122) ~[spring
-context-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74) ~[spring-boot
-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) ~[spring-boot-1.5.6.R
ELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:325) [spring-boot-1.5.6.RELEASE.jar!/:1.5.6.RELEAS
E]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:296) [spring-boot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]
at com.example.domain.api.Application.main(Application.java:36) [classes!/:0.0.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [api-0.0.1.jar:0.0.1]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [api-0.0.1.jar:0.0.1]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [api-0.0.1.jar:0.0.1]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) [api-0.0.1.jar:0.0.1]

另外，我的Maven pom.xml中具有以下属性：

<properties>
<java.source.version>1.8</java.source.version>
<java.target.version>1.8</java.target.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<file.encoding>UTF-8</file.encoding>
</properties>

我做错了什么以及如何正确启动此应用程序？

Answer 1

Java SE 6 支持的两个编码集。在许多情况下，新的java.nio API使用的规范名称与 java.io 和java.lang API中使用的名称不同。

• 如果您使用 java.nio API 的规范名称，则需要使用 ： UTF-8
• 如果你对 java.io 和java.lang API使用规范名称，你需要使用：UTF8

所以使用-Dfile.encoding=UTF-8或-Dfile.encoding=UTF8

Answer 2

系统属性"file.encoding"当前为"Cp1252"。它应该是"UTF-8"(如"spring.mandatoryFileEncoding"中所定义(。

在Windows 10上使用Netbeans 12.0，我能够通过修改如下nbactions.xml来修复错误：

源语言：

<?xml version="1.0" encoding="UTF-8"?>
<actions>
<!-- ... -->
<action>
<properties>
<exec.args>-classpath %classpath br.com.example.Application</exec.args>
<exec.executable>java</exec.executable>
</properties>
</action>
<!-- ... -->
</actions>

在exec.args的第一个位置添加了-Dfile.encoding=UTF-8：

<?xml version="1.0" encoding="UTF-8"?>
<actions>
<!-- ... -->
<action>
<properties>
<exec.args>-Dfile.encoding=UTF-8 -classpath %classpath br.com.example.Application</exec.args>
<exec.executable>java</exec.executable>
</properties>
</action>
<!-- ... -->
</actions>