property配置
之前把设备历史数据存储的时间周期存储在了数据库中,因为以下一些原因,我打算改写到property配置文件中
1、这个周期时间的配置没有单独放一个tabel中,导致现在设备类型越来越多,每次添加或者修改都要去数据库中找,数据混杂在一起,查看不便
2、代码在启动时去读库,读完存储到map中,由于map中存储的数据种类多,还单独搞了一个java类,添加了很多的属性以及属性的get、set方法,真是鸡肋
3、既要管理java类里的属性又要管理数据库的记录,麻烦
开始改写
首先,添加一个配置文件,发现一个限制,这个配置文件只能写到WEB-INF目录下,如果写在src目录下的话,war包里这个配置文件就消失了,意思就是在打包的时候不会把src下的配置文件打包到war中。
于是在WEB-INF目录下添加了一个配置文件。
其次,需要写一个类来加载这个配置文件,又遇到难题,这个路径怎么获取?
我尝试了一些方法去获取路径:
1、用类的路径来获取路径
System.out.println(FrequencyProperty.class.getResource("")); System.out.println(FrequencyProperty.class.getResource("/")); System.out.println(FrequencyProperty.class.getClassLoader().getResource("")); System.out.println(FrequencyProperty.class.getClassLoader().getResource("/"));
file:/D:/eclipse_x64/jboss-eap-6.2/standalone/deployments/mango.war/WEB-INF/dev/com/Socket/event/ file:/D:/eclipse_x64/jboss-eap-6.2/modules/system/layers/base/sun/jdk/main/service-loader-resources/ file:/D:/eclipse_x64/jboss-eap-6.2/modules/system/layers/base/sun/jdk/main/service-loader-resources/ file:/D:/eclipse_x64/jboss-eap-6.2/modules/system/layers/base/sun/jdk/main/service-loader-resources/
很奇怪,只有第一个获取到了类的路径,其他的获取到的都不知道是什么鬼
2、用系统property来获取
Set<Entry<Object, Object>> entrySet = System.getProperties().entrySet(); for (Entry<Object, Object> obj : entrySet) { System.out.println(obj.getKey() + " ========================== " + obj.getValue()); }
java.vendor ========================== Oracle Corporation jboss.modules.system.pkgs ========================== org.jboss.byteman jboss.qualified.host.name ========================== pc202102041904 logging.configuration ========================== file:/D:/eclipse_x64/jboss-eap-6.2/standalone/configuration/logging.properties org.apache.xml.security.ignoreLineBreaks ========================== true sun.java.launcher ========================== SUN_STANDARD javax.xml.stream.XMLInputFactory ========================== __redirected.__XMLInputFactory os.name ========================== Windows 7 sun.management.compiler ========================== HotSpot 64-Bit Tiered Compilers sun.nio.ch.bugLevel ========================== java.runtime.version ========================== 1.8.0_60-b27 java.vm.specification.vendor ========================== Oracle Corporation jboss.server.persist.config ========================== true sun.boot.class.path ========================== D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\resources.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\rt.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\sunrsasign.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\jsse.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\jce.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\charsets.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\jfr.jar;D:\eclipse_x64\jdk1.8.0_60_x64\jre\classes sun.desktop ========================== windows javax.xml.parsers.SAXParserFactory ========================== __redirected.__SAXParserFactory javax.xml.stream.XMLEventFactory ========================== __redirected.__XMLEventFactory javax.xml.stream.XMLOutputFactory ========================== __redirected.__XMLOutputFactory jboss.bind.address ========================== localhost jboss.node.name ========================== pc202102041904 user.name ========================== Administrator java.net.preferIPv4Stack ========================== true java.util.logging.manager ========================== org.jboss.logmanager.LogManager java.version ========================== 1.8.0_60 jboss.home.dir ========================== D:\eclipse_x64\jboss-eap-6.2 sun.boot.library.path ========================== D:\eclipse_x64\jdk1.8.0_60_x64\jre\bin user.language ========================== zh user.timezone ========================== Asia/Shanghai file.encoding.pkg ========================== sun.io java.endorsed.dirs ========================== D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\endorsed jboss.server.config.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\configuration org.jboss.logmanager.nocolor ========================== true sun.arch.data.model ========================== 64 sun.cpu.isalist ========================== amd64 sun.jnu.encoding ========================== GBK file.separator ========================== \ java.class.version ========================== 52.0 java.home ========================== D:\eclipse_x64\jdk1.8.0_60_x64\jre java.specification.name ========================== Java Platform API Specification java.vm.info ========================== mixed mode javax.xml.parsers.DocumentBuilderFactory ========================== __redirected.__DocumentBuilderFactory javax.xml.xpath.XPathFactory:http://java.sun.com/jaxp/xpath/dom ========================== __redirected.__XPathFactory user.country ========================== CN java.protocol.handler.pkgs ========================== org.jboss.net.protocol|org.jboss.vfs.protocol java.vm.version ========================== 25.60-b23 jboss.i18n.generate-proxies ========================== true org.apache.catalina.connector.URI_ENCODING ========================== UTF-8 org.jboss.boot.log.file ========================== D:/eclipse_x64/jboss-eap-6.2/standalone/log/boot.log os.version ========================== 6.1 path.separator ========================== ; sun.awt.enableExtraMouseButtons ========================== true user.variant ========================== awt.toolkit ========================== sun.awt.windows.WToolkit java.awt.printerjob ========================== sun.awt.windows.WPrinterJob jboss.modules.dir ========================== D:\eclipse_x64\jboss-eap-6.2\modules jboss.server.deploy.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\data\content module.path ========================== D:/eclipse_x64/jboss-eap-6.2/modules sun.io.unicode.encoding ========================== UnicodeLittle user.script ========================== java.naming.factory.url.pkgs ========================== org.jboss.as.naming.interfaces:org.jboss.ejb.client.naming jboss.server.temp.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\tmp sun.rmi.dgc.client.gcInterval ========================== 3600000 user.home ========================== C:\Users\Administrator java.library.path ========================== D:\eclipse_x64\jdk1.8.0_60_x64\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;native;D:/eclipse_x64/jdk1.8.0_60_x64/bin/../jre/bin/server;D:/eclipse_x64/jdk1.8.0_60_x64/bin/../jre/bin;D:/eclipse_x64/jdk1.8.0_60_x64/bin/../jre/lib/amd64;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\eclipse_x64\jdk1.8.0_60_x64\bin;D:\eclipse_x64\jdk1.8.0_60_x64\jre\bin;D:\Program Files\TortoiseSVN\bin;C:\Program Files\MySQL\MySQL Server 5.6\bin;D:\Program Files\Redis\;D:\IDEA\apache-maven-3.5.2\bin;D:\Program Files\nodejs\;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files\Microsoft SQL Server\100\DTS\Binn\;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;D:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;D:\Program Files\Microsoft VS Code\bin;C:\Users\Administrator\AppData\Roaming\npm;E:\eclipse_4.6_x64;;. java.specification.vendor ========================== Oracle Corporation java.vendor.url ========================== http://java.oracle.com/ org.jboss.resolver.warning ========================== true org.xml.sax.driver ========================== __redirected.__XMLReaderFactory program.name ========================== JBossTools: Red Hat JBoss EAP 6.1+ java.class.path ========================== D:\eclipse_x64\jboss-eap-6.2\jboss-modules.jar java.runtime.name ========================== Java(TM) SE Runtime Environment java.vm.vendor ========================== Oracle Corporation jboss.bind.address.management ========================== localhost org.jboss.security.context.ThreadLocal ========================== true sun.java.command ========================== org.jboss.modules.Main -mp D:/eclipse_x64/jboss-eap-6.2/modules -jaxpmodule javax.xml.jaxp-provider -jaxpmodule javax.xml.jaxp-provider org.jboss.as.standalone -b localhost --server-config=standalone.xml -Djboss.server.base.dir=D:\eclipse_x64\jboss-eap-6.2\standalone sun.rmi.dgc.server.gcInterval ========================== 3600000 catalina.home ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\tmp java.vm.specification.name ========================== Java Virtual Machine Specification java.vm.specification.version ========================== 1.8 javax.xml.validation.SchemaFactory:http://www.w3.org/2001/XMLSchema ========================== __redirected.__SchemaFactory jboss.server.log.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\log sun.cpu.endian ========================== little sun.os.patch.level ========================== Service Pack 1 java.awt.graphicsenv ========================== sun.awt.Win32GraphicsEnvironment java.awt.headless ========================== true java.ext.dirs ========================== D:\eclipse_x64\jdk1.8.0_60_x64\jre\lib\ext;C:\Windows\Sun\Java\lib\ext java.io.tmpdir ========================== C:\Users\ADMINI~1\AppData\Local\Temp\ java.vendor.url.bug ========================== http://bugreport.sun.com/bugreport/ jboss.server.data.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone\data os.arch ========================== amd64 java.vm.name ========================== Java HotSpot(TM) 64-Bit Server VM javax.management.builder.initial ========================== org.jboss.as.jmx.PluggableMBeanServerBuilder jboss.server.base.dir ========================== D:\eclipse_x64\jboss-eap-6.2\standalone line.separator ========================== org.apache.catalina.connector.USE_BODY_ENCODING_FOR_QUERY_STRING ========================== true user.dir ========================== D:\eclipse_x64\jboss-eap-6.2\bin file.encoding ========================== GBK java.specification.version ========================== 1.8 javax.xml.datatype.DatatypeFactory ========================== __redirected.__DatatypeFactory javax.xml.transform.TransformerFactory ========================== __redirected.__TransformerFactory jboss.host.name ========================== pc202102041904 jboss.server.name ========================== pc202102041904
这个jboss.server.base.dir还是有用的
相比较这个方式1和方式2,方式一的更可取,因为方式一包含了项目的名称,这样只要截取就行,但是方法2还需要固定的加上项目名称,但是名称一旦改变,还得记着来改这里,这样不太合适
还有一点比较奇怪的地方,一开始我不想截取方式一中的字符串,我想用上级目录来获取,但是结果有点让人诧异
System.out.println(FrequencyProperty.class.getResource("")); System.out.println(FrequencyProperty.class.getResource("../")); System.out.println(FrequencyProperty.class.getResource("../../")); System.out.println(FrequencyProperty.class.getResource("../../../"));
file:/D:/eclipse_x64/jboss-eap-6.2/standalone/deployments/mango.war/WEB-INF/dev/com/Socket/event/ file:/D:/eclipse_x64/jboss-eap-6.2/standalone/deployments/mango.war/WEB-INF/dev/com/Socket/ jar:file:/D:/eclipse_x64/jboss-eap-6.2/modules/system/layers/base/javax/activation/api/main/activation-1.1.1-redhat-2.jar!/com/ file:/D:/eclipse_x64/jboss-eap-6.2/modules/system/layers/base/sun/jdk/main/service-loader-resources/
搞不懂,除了第二个是真的上级,其他两个都是啥
看下最终的代码吧
String path = FrequencyProperty.class.getResource("").getPath(); path = path.replace("dev/com/Socket/event/", ""); InputStream in = new FileInputStream(path + "frequency.properties"); props.load(in);
对了,如果单纯的只跑main方法,不跑web项目,结果又是大不一样
System.out.println(FrequencyProperty.class.getResource("")); System.out.println(FrequencyProperty.class.getResource("/")); System.out.println(FrequencyProperty.class.getClassLoader().getResource("")); System.out.println(FrequencyProperty.class.getClassLoader().getResource("/"));
file:/D:/eclipse_x64/workspace/mango/classes/hot/com/Socket/event/ file:/D:/eclipse_x64/workspace/mango/classes/hot/ file:/D:/eclipse_x64/workspace/mango/classes/hot/ null
没有时间深入去研究了,暂且就这样记录下来吧,渴死了,喝口水去