java Gradle 日志输出级别
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Gradle Logging Output Levels
提问by SS44
In my project classes I've used java.util.logging.Loggerand added various log output's throughout my code, using various log levels ie.
在我的项目类中，我在java.util.logging.Logger整个代码中使用并添加了各种日志输出，使用各种日志级别，即。
src/main/java/Run.java
src/main/java/Run.java
import java.util.logging.Level;
import java.util.logging.Logger;
public class Run{
public static void main( String args[] ){
System.out.println("Hello World");
logger.log(Level.CONFIG, "Just some config info");
Logger logger = Logger.getLogger(Run.class.getName());
logger.log(Level.INFO, "Just logging some info");
logger.log(Level.FINE, "Fine logging");
logger.log(Level.FINER, "Finer logging");
logger.log(Level.WARNING, "This is a warning log!");
}
}
Currently when I run gradle -i testall log messages with the Level.INFOdefined are shown but none of the config, warn or fine messages are output.
目前，当我运行gradle -i test所有带有Level.INFO定义的日志消息时，显示但没有输出配置、警告或罚款消息。
I've tried updating my build.gradlefile such that:
我试过更新我的build.gradle文件，这样：
apply plugin: 'java'
apply plugin:'application'
mainClassName = "Run"
repositories {
mavenCentral()
}
dependencies {
testCompile "junit:junit:4.11"
}
run{
systemProperties = ['java.util.logging.config.file' : 'logging.properties']
}
I've included:
我已经包括：
systemProperties = ['java.util.logging.config.file' : 'logging.properties']
Then created /src/main/resource/logging.propertiess
然后创建/src/main/resource/logging.propertiess
handlers= java.util.logging.ConsoleHandler
.level= CONFIG
java.util.logging.ConsoleHandler.level = FINER
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
Running:
跑步：
gradle run
I get:
我得到：
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:run
Hello World
BUILD SUCCESSFUL
And when running gradle -i runI get: Successfully started process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java'' Hello World :run (Thread[main,5,main]) completed. Took 0.202 secs.
当运行gradle -i run我得到： 成功启动进程 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java'' Hello World :run (Thread[main,5,主要]）完成。耗时 0.202 秒。
BUILD SUCCESSFUL
ie. no logging information. However commenting out the system.properties from within the run task and re-running gradle -i runI get:
IE。没有日志信息。但是从运行任务中注释掉 system.properties 并重新运行gradle -i run我得到：
Successfully started process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java''
Hello World
Nov 05, 2014 12:07:42 PM Run main
INFO: Just logging some info
Nov 05, 2014 12:07:42 PM Run main
WARNING: This is a warning log!
:run (Thread[main,5,main]) completed. Took 0.229 secs.
BUILD SUCCESSFUL
The info and warning level logs, but not the fine or finer ones.
信息和警告级别记录，但不是罚款或更精细的。
tldr;
tldr;
How do I get the config, fine & finer level logs to log to the console in a generic gradle java project ?
如何在通用 gradle java 项目中获取配置、精细和更精细级别的日志以登录到控制台？
回答by jalopaba
Several options (I personally prefer option 2.2):
几个选项（我个人更喜欢选项 2.2）：
1) Custom logging.properties file:
1) 自定义 logging.properties 文件：
The Java Logging API has a default logging configuration file at <JRE_HOME>/lib/logging.properties. You can use your own config file setting the JVM property java.util.logging.config.file.
Java Logging API 有一个默认的日志配置文件，位于<JRE_HOME>/lib/logging.properties. 您可以使用自己的配置文件设置 JVM 属性java.util.logging.config.file。
handlers = java.util.logging.ConsoleHandler
Run.handlers = java.util.logging.ConsoleHandler
Run.level = FINER
Run.useParentHandlers = false
java.util.logging.ConsoleHandler.level = ALL
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
You have to set useParentHandlers = falseto avoid getting duplicate prints from parent handlers.
您必须设置useParentHandlers = false以避免从父处理程序获得重复打印。
1.1) Set above property with absolute path
1.1) 使用绝对路径设置上述属性
Did not even try ;-)
甚至没有尝试;-)
1.2) Load custom file as follows in Run.java
1.2）加载自定义文件如下 Run.java
Loading it as follows in Run.java:
加载如下Run.java：
InputStream inputStream = Run.class.getResourceAsStream("mylogging.properties");
try {
LogManager.getLogManager().readConfiguration(inputStream);
} catch(Exception e) {
e.printStackTrace();
}
2) Custom system property (i.e.: logLevel)
2）自定义系统属性（即：logLevel）
Define a systemPropertyin your build.gradle:
定义systemProperty你的build.gradle：
run {
systemProperty 'logLevel', System.getProperty('logLevel')
}
Add a defaultLogLevelin Run.java:
添加defaultLogLevel在Run.java：
public static Level defaultLevel = Level.INFO;
Get the value of logLevelproperty:
获取logLevel属性值：
String logLevel = System.getProperty("logLevel");
And set the defined level in logger:
并在记录器中设置定义的级别：
Logger logger = Logger.getLogger(Run.class.getName());
logger.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));
2.1) Create a new ConsoleHandlerand switch-off print from parent handlers
2.1)ConsoleHandler从父处理程序创建一个新的和关闭的打印
System.out.println(Run.class.getName());
Logger logger = Logger.getLogger(Run.class.getName());
logger.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));
Handler consoleHandler = new ConsoleHandler();
consoleHandler.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));
logger.addHandler(consoleHandler);
logger.setUseParentHandlers(false);
2.2) Find parent ConsoleHandlerand set defined level
2.2) 找到父ConsoleHandler级并设置定义的级别
Logger topLogger = Logger.getLogger("");
Handler consoleHandler = null;
for (Handler handler : topLogger.getHandlers()) {
if (handler instanceof ConsoleHandler) {
//found the console handler
consoleHandler = handler;
break;
}
}
if (consoleHandler == null) {
// not found, create a new one
consoleHandler = new ConsoleHandler();
topLogger.addHandler(consoleHandler);
}
//set the console handler level
consoleHandler.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));
With that, gradle runyields messages above the default level (INFO). With
这样，gradle run产生高于默认级别（INFO）的消息。和
gradle run -DlogLevel=FINE
you can control which messages are shown.
您可以控制显示哪些消息。
