log4j-jsonlayout

# JsonLayout ## 1、项目说明 本项目通过自定义Layout实现log4j的JSON输出格式。 ### 1.1、运行环境 * JDK 1.7+ ### 1.2、配置示例 > log4j.appender.jsonLog.layout = com.zhph.log4j.layout.JsonLayout > log4j.appender.jsonLog.layout.customFields = class,method,line,message **其中：** * **_com.zhph.log4j.layout.JsonLayout_** 是 JsonLayout 的类全名； * **_customFields_** 可配可不配，不配时输出全部字段，如果配置则只输出配置的字段，字段间以英文逗号分割。 ### 1.3、customFields的所有可配字段 1. **logger** String，Logger的名称 2. **timeMillis** long，时间戳 3. **time** String，时间戳，格式为yyyy-MM-dd HH:mm:ss 4. **level** String，日志级别，如ERROR等 5. **thread** String，线程名 6. **file** String，类文件名 7. **class** String，类全名 8. **method** String，方法名 9. **line** String，行数 10. **message** String，日志消息 11. **throwable** Object，异常信息 12. **userName** String，PC的用户名 13. **computerName** String，PC名称 14. **userDomain** String，PC用户的域 15. **localHostName** String，主机名 16. **localCanonicalHostName** String，规范的主机名 17. **localHostAddress** String，主机地址 18. **localHashCode** Long，主机的hash ## 2、更新说明 ### v1.1 2017/06/23 * 添加了属性 **prefix** 以便配置消息前缀，缺省时为空 * 添加了属性 **suffix** 以便配置消息后缀，缺省时为空 * 示例： > log4j.appender.jsonLog.layout.prefix = > log4j.appender.jsonLog.layout.suffix = , ### v1.2 2017/08/10 * 更正的日志时间显示问题 ### v1.3 2018/01/31 * 增加了主机的相关信息，以支持用以区分集群下的各个节点 * 使日志输出与配置顺序保持一致 ## 3、应用示例 ### 3.1、缺省配置 缺省配置指的是不配置指定的字段以及前后缀，如：  对应的日志输入内容： > {"class":"com.zhph.log4j.layout.TestClass","file":"TestClass.java","level":"ERROR","line":"11","logger":"testJsonLog","message":"这是日志消息内容","method":"test01","thread":"main","throwable":{"cause":null,"class":"java.lang.Exception","localizedMessage":"这里是异常信息内容","message":"这里是异常信息内容","suppressed":[],"throwableStrRep":["java.lang.Exception: 这里是异常信息内容","\tat com.zhph.log4j.layout.TestClass.test01(TestClass.java:11)","\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)","\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)","\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)","\tat java.lang.reflect.Method.invoke(Method.java:606)","\tat org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)","\tat org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)","\tat org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)","\tat org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)","\tat org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)","\tat org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)","\tat org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)","\tat org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)","\tat org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)","\tat org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)","\tat org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)","\tat org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)","\tat org.junit.runners.ParentRunner.run(ParentRunner.java:292)","\tat org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)","\tat org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)","\tat org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)","\tat org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)","\tat org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)","\tat org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)"]},"time":"2017-06-26 14:40:33","timeMillis":1498459233725} 格式化处理后： ``` { "class":"com.zhph.log4j.layout.TestClass", "file":"TestClass.java", "level":"ERROR", "line":"11", "logger":"testJsonLog", "message":"这是日志消息内容", "method":"test01", "thread":"main", "throwable":{ "cause":null, "class":"java.lang.Exception", "localizedMessage":"这里是异常信息内容", "message":"这里是异常信息内容", "suppressed":[ ], "throwableStrRep":[ "java.lang.Exception: 这里是异常信息内容", " at com.zhph.log4j.layout.TestClass.test01(TestClass.java:11)", " at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)", " at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)", " at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)", " at java.lang.reflect.Method.invoke(Method.java:606)", " at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)", " at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)", " at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)", " at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)", " at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)", " at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)", " at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)", " at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)", " at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)", " at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)", " at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)", " at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)", " at org.junit.runners.ParentRunner.run(ParentRunner.java:292)", " at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)", " at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)", " at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)", " at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)", " at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)", " at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)" ] }, "time":"2017-06-26 14:40:33", "timeMillis":1498459233725 } ``` ### 3.2、自定义配置 自定义配置是指自定义要显示的日志信息字段，如：  对应的日志输入内容： > {"class":"com.zhph.log4j.layout.TestClass","line":"11","message":"这是日志消息内容","method":"test01"} 格式化处理后： ``` { "class":"com.zhph.log4j.layout.TestClass", "line":