装饰器的实际应用

publicclassJsonLoggerDecoratorimplementsLogger {
protectedfinalLoggerlogger;
publicJsonLoggerDecorator(Loggerlogger) {
this.logger=logger;
    }
@OverridepublicStringgetName() {
returnnull;
    }
@OverridepublicbooleanisTraceEnabled() {
returnfalse;
    }
@Overridepublicvoidtrace(Stringmsg) {
    }
@Overridepublicvoidtrace(Stringformat, Objectarg) {
    }
@Overridepublicvoidtrace(Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidtrace(Stringformat, Object... arguments) {
    }
@Overridepublicvoidtrace(Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisTraceEnabled(Markermarker) {
returnfalse;
    }
@Overridepublicvoidtrace(Markermarker, Stringmsg) {
    }
@Overridepublicvoidtrace(Markermarker, Stringformat, Objectarg) {
    }
@Overridepublicvoidtrace(Markermarker, Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidtrace(Markermarker, Stringformat, Object... argArray) {
    }
@Overridepublicvoidtrace(Markermarker, Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisDebugEnabled() {
returnfalse;
    }
@Overridepublicvoiddebug(Stringmsg) {
    }
@Overridepublicvoiddebug(Stringformat, Objectarg) {
    }
@Overridepublicvoiddebug(Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoiddebug(Stringformat, Object... arguments) {
    }
@Overridepublicvoiddebug(Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisDebugEnabled(Markermarker) {
returnfalse;
    }
@Overridepublicvoiddebug(Markermarker, Stringmsg) {
    }
@Overridepublicvoiddebug(Markermarker, Stringformat, Objectarg) {
    }
@Overridepublicvoiddebug(Markermarker, Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoiddebug(Markermarker, Stringformat, Object... arguments) {
    }
@Overridepublicvoiddebug(Markermarker, Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisInfoEnabled() {
returnfalse;
    }
@Overridepublicvoidinfo(Stringmsg) {
    }
@Overridepublicvoidinfo(Stringformat, Objectarg) {
    }
@Overridepublicvoidinfo(Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidinfo(Stringformat, Object... arguments) {
    }
@Overridepublicvoidinfo(Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisInfoEnabled(Markermarker) {
returnfalse;
    }
@Overridepublicvoidinfo(Markermarker, Stringmsg) {
    }
@Overridepublicvoidinfo(Markermarker, Stringformat, Objectarg) {
    }
@Overridepublicvoidinfo(Markermarker, Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidinfo(Markermarker, Stringformat, Object... arguments) {
    }
@Overridepublicvoidinfo(Markermarker, Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisWarnEnabled() {
returnfalse;
    }
@Overridepublicvoidwarn(Stringmsg) {
    }
@Overridepublicvoidwarn(Stringformat, Objectarg) {
    }
@Overridepublicvoidwarn(Stringformat, Object... arguments) {
    }
@Overridepublicvoidwarn(Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidwarn(Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisWarnEnabled(Markermarker) {
returnfalse;
    }
@Overridepublicvoidwarn(Markermarker, Stringmsg) {
    }
@Overridepublicvoidwarn(Markermarker, Stringformat, Objectarg) {
    }
@Overridepublicvoidwarn(Markermarker, Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoidwarn(Markermarker, Stringformat, Object... arguments) {
    }
@Overridepublicvoidwarn(Markermarker, Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisErrorEnabled() {
returnfalse;
    }
@Overridepublicvoiderror(Stringmsg) {
    }
@Overridepublicvoiderror(Stringformat, Objectarg) {
    }
@Overridepublicvoiderror(Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoiderror(Stringformat, Object... arguments) {
    }
@Overridepublicvoiderror(Stringmsg, Throwablet) {
    }
@OverridepublicbooleanisErrorEnabled(Markermarker) {
returnfalse;
    }
@Overridepublicvoiderror(Markermarker, Stringmsg) {
    }
@Overridepublicvoiderror(Markermarker, Stringformat, Objectarg) {
    }
@Overridepublicvoiderror(Markermarker, Stringformat, Objectarg1, Objectarg2) {
    }
@Overridepublicvoiderror(Markermarker, Stringformat, Object... arguments) {
    }
@Overridepublicvoiderror(Markermarker, Stringmsg, Throwablet) {
    }
}

importcom.alibaba.fastjson.JSONObject;
importorg.slf4j.Logger;
importjava.util.Arrays;
publicclassJsonLoggerextendsJsonLoggerDecorator {
publicJsonLogger(Loggerlogger) {
super(logger);
    }
@Overridepublicvoidinfo(Stringmsg) {
JSONObjectjsonObject=this.newJsonObject();
jsonObject.put("message", msg);
logger.info(jsonObject.toJSONString());
    }
@Overridepublicvoiderror(Stringmsg) {
JSONObjectjsonObject=this.newJsonObject();
jsonObject.put("message", msg);
logger.error(jsonObject.toJSONString());
    }
/*** 重载一个异常的error** @param e*/publicvoiderror(Exceptione) {
JSONObjectjsonObject=this.newJsonObject();
jsonObject.put("name", e.getClass().getName());
StringstackTrace=Arrays.toString(e.getStackTrace());
jsonObject.put("stackTrace", stackTrace);
logger.error(jsonObject.toJSONString());
    }
privateJSONObjectnewJsonObject() {
returnnewJSONObject();
    }
}

importorg.slf4j.Logger;
importorg.slf4j.LoggerFactory;
publicclassJsonLoggerFactory {
publicstaticJsonLoggergetJsonLogger(Class<?>clazz) {
Loggerlogger=LoggerFactory.getLogger(clazz);
returnnewJsonLogger(logger);
    }
}

publicclassJsonLoggerTest {
privatestaticfinalJsonLoggerlogger=JsonLoggerFactory.getJsonLogger(JsonLoggerTest.class);
publicstaticvoidmain(String[] args) {
logger.info("info日志");
logger.error("系统异常");
logger.error(newException("抛出异常"));
    }
}