这是一个学校的家庭作业:我必须构建一个自定义记录器类,能够从项目中的任何地方进行记录。
除了java.util.logger,我不能使用其他任何东西。 我正在使用位于项目中/conf 文件夹中的属性文件。
我收到此错误:
属性的错误级别值:java.util.logging.FileHandler.level
无法为 java.util.logging.FileHandler 设置级别
我认为这就是为什么我的 debug() 方法无法在我的文件中打印"ddd",以及为什么我不能使用我设置的这个字符串格式化文件:"[%1$tc] - [%2$s] [%4$s] [%5$s] %n"。
我无法理解我在 conf 文件或代码中可能犯的错误:导入是正确的,我对代码没有错误/警告。
我知道我永远不应该使用绝对路径,但我认为这不是我的问题,解决此问题后路径将得到修复。
我的 try.log 的这个输出在我的/test 文件夹中:
03-Jan-2018 14:01:03 logger.classLogger 警告
警告:请注意
请 03-Jan-2018 14:01:03 logger.classLogger 错误
SEVERE:错误
03-Jan-2018 14:01:03 logger.classLogger 信息
信息: 信息
这是我的 .properties 文件:
.level=ALL
handlers = java.util.logging.FileHandler
java.util.logging.FileHandler.level = FINE
java.util.logging.FileHandler.append = true
java.util.logging.FileHandler.limit = 1000000
java.util.logging.FileHandler.count = 100
java.util.logging.FileHandler.pattern = %t/Log%u%g.log
java.util.logging.SimpleFormatter.format = "[%1$tc] - [%2$s] [%4$s] [%5$s] %n"
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
这是我的班级:
public class classLogger {
Logger logger;
FileHandler fh;
SimpleFormatter sf;
public classLogger(String classname){
this.logger = Logger.getLogger(classname);
logger.setLevel(Level.ALL);
try {
String path = "D:\myprojects\logger\conf\logging.properties";
FileInputStream configFile = new FileInputStream(path);
LogManager.getLogManager().readConfiguration(configFile);
}
catch (IOException ex)
{
}
try {
String directory = "C:\Documents and Settings\E520user\Desktop\test";
String filename = "\try.log";
this.fh = new FileHandler(directory+filename);
}
catch (IOException ex1) {
}
this.sf = new SimpleFormatter();
//set formatter
fh.setFormatter(sf);
//add handler
logger.addHandler(fh);
}
public void error(String msg){
logger.severe(msg);
}
public void warning(String msg){
logger.warning(msg);
}
public void info(String msg){
logger.info(msg);
}
public void debug(String msg){
logger.fine(msg);
}
public static void main(String[] args) {
IRSLogger log = new classLogger(classLogger.class.getName());
log.warning("attention please");
log.error("error");
log.debug("dddd");
log.info("info");
}
}
在我的Mac上试用过,它工作正常
$ cat try.log
"[Wed Jan 03 14:35:22 GMT 2018] - [classLogger warning] [WARNING] [attention please]
""[Wed Jan 03 14:35:22 GMT 2018] - [classLogger error] [SEVERE] [error]
""[Wed Jan 03 14:35:22 GMT 2018] - [classLogger debug] [FINE] [dddd]
""[Wed Jan 03 14:35:22 GMT 2018] - [classLogger info] [INFO] [info]
但是我也收到以下消息:Can't set level for java.util.logging.FileHandler
您可以尝试从属性文件中删除java.util.logging.FileHandler.level = FINE
吗?
提示
您应该删除以下行中的"
:java.util.logging.SimpleFormatter.format = "[%1$tc] - [%2$s] [%4$s] [%5$s] %n"
编辑:这适用于我的电脑
import java.io.FileInputStream;
import java.io.IOException;
import java.util.logging.*;
public class ClassLogger {
private Logger logger;
private FileHandler fh;
public ClassLogger(String classname){
this.logger = Logger.getLogger(classname);
try {
String path = "/Users/myUser/Workspace/stackoverflow/test/src/main/java/logging.properties";
FileInputStream configFile = new FileInputStream(path);
LogManager.getLogManager().readConfiguration(configFile);
} catch (IOException ex) {
ex.printStackTrace();
}
try {
String directory = "/Users/myUser/Workspace/stackoverflow/test/src/main/java/";
String filename = "try.log";
this.fh = new FileHandler(directory+filename);
} catch (IOException ex1) {
ex1.printStackTrace();
}
//add handler
logger.addHandler(fh);
}
public void error(String msg) { logger.severe(msg);}
public void warning(String msg) { logger.warning(msg); }
public void info(String msg) { logger.info(msg); }
public void debug(String msg) { logger.fine(msg); }
public static void main(String[] args) {
ClassLogger log = new ClassLogger(ClassLogger.class.getName());
log.warning("attention please");
log.error("error");
log.debug("dddd");
log.info("info");
}
}
logging.properties
.level=ALL
handlers = java.util.logging.FileHandler
java.util.logging.FileHandler.append = true
java.util.logging.FileHandler.limit = 1000000
java.util.logging.FileHandler.count = 100
java.util.logging.FileHandler.pattern = %t/Log%u%g.log
java.util.logging.SimpleFormatter.format = [%1$tc] - [%2$s] [%4$s] [%5$s] %n
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
它以try.log
输出
[Wed Jan 03 15:27:55 GMT 2018] - [ClassLogger warning] [WARNING] [attention please]
[Wed Jan 03 15:27:55 GMT 2018] - [ClassLogger error] [SEVERE] [error]
[Wed Jan 03 15:27:55 GMT 2018] - [ClassLogger debug] [FINE] [dddd]
[Wed Jan 03 15:27:55 GMT 2018] - [ClassLogger info] [INFO] [info]