On the eastern routes

Because of Indonesia's location on the trade route between North and
South as well as from West to East, the North coast of Java was often
visited by foreign vessels.
It results in a lively exchange of a variety of goods including
ceramics and silks from China and the cinde or silk with the patola
motif from the west of India.The foreign art and culture were absorbed
and fused with the existing javanese one, resulting in new works of
art with their unique beauty. Merchants from all over the world came
to the Indonesian archipelago: Chinese, Indians, Portuguese, Arabs,
Dutch, and British.
The growing importance of the region as a centre of trade between
China in the East and India and Arabia in the West saw the emergence
of a great Southeast Asian empire, the Srivijaya. Textiles were
already among the major items of trade, like silk, brocade and damask
brought from China, and cotton from India.
Chinese traders had been settling on the islands long before the
arrival of the European powers (British, Dutch, in particular). Each
of them have influenced by their own taste the design of batik.

Source : discover-indo