快捷键基本与 Android Studio 一致,这里重点记录解决遇到过的问题。
Q&A
解决导入 Eclipse Maven 工程后无法读取 .xml 文件的问题
IDEA 与 Eclipse 配置文件目录的方式不同,可以将文件夹标记为 Sources、Resources 和 tests 等,而 src/main/java 默认被标记为 Sources,src/main/resources 才默认被标记为 Resources,编译时自动复制。
这样放在 src/main/java 目录下的文件与子文件夹均为 Sources,只将编译生成的 .class 文件复制到编译目录,在 Eclipse Maven 工程里放在 src/main/java 文件夹里的 xml、props 和 properties 文件就不会被拷贝到编译文件夹,导致执行时找不到这些文件,报类似下面这样的错误:
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [spring-demo.xml]; nested exception is java.io.FileNotFoundException: class path resource [spring-demo.xml] cannot be opened because it does not exist
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:343)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:251)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:540)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at org.mazhuang.demo.protocol.db.DemoContext.init(DemoContext.java:22)
at org.mazhuang.demo.protocol.DemoServer.start(DemoServer.java:40)
at org.mazhuang.demo.DemoSrv.main(DemoSrv.java:17)
Caused by: java.io.FileNotFoundException: class path resource [spring-demo.xml] cannot be opened because it does not exist
at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:158)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:329)
... 15 more
解决方案:
可以通过在 pom.xml 文件里添加 resources 配置来指定将哪些文件作为 resources 包含:
<build>
<resources>
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.props</include>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</build>
如何导出 jar 包
File -> Project Structure -> Artifacts -> Click green plus sign -> Jav -> From modules with dependencies
Build -> Build Artifacts
去掉 UTF-8 文件的 BOM
UTF-8 文件带 BOM 里会编译报错:
Error:(1, 1) error: illegalcharacter: '\ufeff'
解决方法:
右键项目名称 -> Remove BOM
FreeMarker 模板实时生效
-
在配置文件里关闭 FreeMarker 缓存,设置模板更新延迟时间为 0:
spring: freemarker: cache: false settings: template_update_delay: 0
-
修改 IDEA 设置,开启 Build project automatically
-
双击 shift,输入 registry,然后回车选中图中项:
-
找到并勾选 compiler.automake.allow.when.app.running:
-
重新启动项目。
修改模板后可能会有几秒延时,刷新两遍就好了。