Mule variable in MEL as String

Question

i have an expression bellow to read a file from resources :

#[Thread.currentThread().getContextClassLoader().getResourceAsStream('abc.txt')]

it worked fine, but i want to use a variable like this one:

#[Thread.currentThread().getContextClassLoader().getResourceAsStream(flowVars['fileName'])]

it does not work,

1. how can i make it work like the first one MEL ?
2. how can i read a file in absolute path "D://input/abc.txt" using MEL ?

Thanks for helps.

resolved

1. use flowVars.filename instead of flowVars['fileName'] it worked, but i can't get it, i use logger with this MEL #[flowVars['filename']] and it work too but in the second MEL it failed.

Answer 1

1) You are using a different case with the two different approaches. Variable names are case sensitive.

2) Just use a FileInputStream:

 #[new FileInputStream("path")]

Or even better maybe to use the File transport/Mule Requester Module.

Answer 2

试试这个，用变量名代替关键字“ flowVars”

#[Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName)]