Spring 10系统属性“file.encoding”

Question

我试图用以下命令启动：

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

但是，如果出现以下错误，则会失败：

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]

而且，我的Maven pom.xml中有以下属性：

<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，如何正确启动这个应用程序？

Answer 1

Java 6支持两个编码集，新的java.nio API使用的规范名称在许多情况下与java.io和java.lang API中使用的名称不同。

• 如果您对java.nio API使用规范名称，则需要使用: UTF-8。
• 如果您对java.io和java.lang API使用规范名称，则需要使用: UTF8

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

Answer 2

系统属性'file.encoding‘目前是’is 1252‘。它应该是'UTF-8‘(在’spring.mandatoryFileEncoding‘中定义)。

在Windows 10上使用Netbeans 12.0可以通过如下修改nbactions.xml来修复错误：

原版：

<?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>

-Dfile.encoding=UTF-8 在 exec.args**:**的第一名中添加了

<?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>