Arthas use

arthas Installation

MAC  And  Linux Use 
curl -O https://arthas.aliyun.com/arthas-boot.jar

Windows Download it directly 
https://arthas.aliyun.com/arthas-boot.jar

arthas start-up

java -Dfile.encoding=UTF-8 -jar arthas-boot.jar

 Then choose the program you want 
 Enter the number and press enter 

 If you want to quit using stop, Don't use it. exit;
 Use exit sign out , If you want to enter other projects, there will be port occupancy , Use stop Will close arthas

Decompiled code

You can confirm whether the new code is successfully deployed

//  Decompile command 
 Format  jad --source-only  Package name to class name   Space   Method name  【--lineNumber true/false】 optional    This is of no great use 

 give an example 
jad --source-only com.community.service.CacheService getCache1 --lineNumber false

//  Look directly at the whole class   Do not add line number restrictions 
jad --source-only com.hxb.CacheService

watch（ The most commonly used ）

You can check whether the request passes through this method
You can check the length of time
You can check the input parameters , Return value and exception

watch com.hxb.ext.HostHolderImpl getUser {
    params,returnObj} -n 2 -x 1

 Minutiae ：：
	-n  Indicates the number of views , Not setting may pop up a lot 
	-x  Represents the depth of parsing ,
 give an example ： -x 1 The return value of 
  @User[com.hxb.model.User@35eaa946],
  
	-x 2 The return value of will be displayed .
	@User[
        id=@Long[54],
        type=@Integer[1],
        name=@String[ Administrators ],
        phone=null,
        .....
    ],

 If an exception occurs, the return value is null,
 Therefore, it is generally necessary to add throwExp
 Can show exceptions 

 Final realization 
watch com..DepartmentResource newRole {
    params,returnObj,throwExp} -n 3 -x 2

I hope you can point out some mistakes ！！！
There are other common commands or tools that I hope you can recommend in the comment area , thank .