how to make Json lib generate such string: \/Date(1317375052044)\/

My target is to generate such json string: {"EndTime": "\/Date(1309737600000)\/"}

I define a HashMap to generate the string

If I define the string value as "\\/Date(1317375052044)\\/" then the result is "\\\\/Date(1317375052044)\\\\/".

If I define the string as "/Date(1317375052044)/" then the result is "/Date(1317375052044)/".

How I can generat开发者_如何学Goe the result "\/Date(1309737600000)\/"?

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Duplicated from How should I escape strings in JSON? . Following this response try defining the string as "\\\\/Date(1317375052044)\\\\/" because in Java String '\' is also a escape character!