character encoding - Java URLEncode giving different results -

i have code stub:

system.out.println(param+"="+value); param = urlencoder.encode(param, "utf-8"); value = urlencoder.encode(value, "utf-8"); system.out.println(param+"="+value); 

this gives result in eclipse:

p=指甲油 p=%e6%8c%87%e7%94%b2%e6%b2%b9 

but when run same code command line, following output:

p=指甲油 p=%c3%8a%c3%a5%c3%a1%c3%81%c3%ae%e2%89%a4%c3%8a%e2%89%a4%cf%80 

what problem?

your mac using mac os roman encoding in terminal. chinese characters incorrectly been interpreted using mac os roman encoding instead of utf-8 encoding before sending java.

as evidence, chinese characters exist in utf-8 encoding of following (hex) bytes:

• 指 = 0xe6 0x8c 0x87
• 甲 = 0xe7 0x94 0xb2
• 油 = 0xe6 0xb2 0xb9

then check mac os roman codepage layout, (hex) bytes represent following characters:

• 0xe6 0x8c 0x87 = Ê å á
• 0xe7 0x94 0xb2 = Á î ≤
• 0xe6 0xb2 0xb9 = Ê ≤ π

now, put them , url-encode them using utf-8:

system.out.println(urlencoder.encode("指甲油", "utf-8")); 

look prints?

%c3%8a%c3%a5%c3%a1%c3%81%c3%ae%e2%89%a4%c3%8a%e2%89%a4%cf%80

to fix problem, tell mac use utf-8 encoding in terminal. honestly, can't answer part off top of head don't mac. eclipse encoding configuration totally fine, case that, configure via window > preferences > general > workspace > text file encoding.

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update: missed comment:

i reading value text file

if variables originating text file instead of commandline input — expected —, need solve problem differently. apparently, using reader implementation using runtime environment's default character encoding so:

reader reader = new filereader("/file.txt"); // ... 

you should instead explicitly specifying desired encoding while creating reader. can inputstreamreader constructor.

reader reader = new inputstreamreader(new fileinputstream("/file.txt"), "utf-8"); // ... 

this explicitly tell java read /file.txt using utf-8 instead of runtime environment's default encoding available charset#defaultcharset().

system.out.println("this runtime environment uses default charset " + charset.defaultcharset());