Log4j is a logging tool that is commonly used in programs and has five levels: the level of log4J

Today’s question: What do I do when I print three or more parameters? Straight to the basics:

Logger. The info (" tryGetCustomerByJdPinAndDepartNo - into the ginseng jdPin: {}, departNo: {}, init; {}", jdPin, departNo,JSON.toJSONString(init));Copy the code

Error message:

The reason:

Find the source: logger. class

The method structure of InfoD is shown below:

    void info(String var1);     void info(String var1, Object var2);     void info(String var1, Object var2, Object var3);     void info(String var1, Object[] var2);     void info(String var1, Throwable var2);     boolean isInfoEnabled(Marker var1);     void info(Marker var1, String var2);     void info(Marker var1, String var2, Object var3);     void info(Marker var1, String var2, Object var3, Object var4);     void info(Marker var1, String var2, Object[] var3);     void info(Marker var1, String var2, Throwable var3);
Copy the code

Conclusion: With 3 or more parameters, another method is needed:

Construct an array of objects

Logger. The info (" tryGetCustomerByJdPinAndDepartNo - into the ginseng jdPin: {}, departNo: {}, init; {}", new String[] {jdPin, departNo,JSON.toJSONString(init)});Copy the code