jmeter 如何提取相同的第二个参数值，如{"data":[{"img":"","id":"1","name":"\u540d\u5f85\u4f18\u54c1","cat":[{"category_id":"8","name":"\u5ddd\u5473\u7279\u4ea7","cat":[{"category_id":"27","name":"\u9ebb\u8fa3\u725b\u8089"}],"brand":[{"brand_id":"9","brand_name":"\u53cc\u6d41\u5e84\u5f0f\u871c\u8702\u517b\u6b96\u5408\u4f5c\u793e"},{"brand_id":"15","brand_name":"\u5723\u6d66"}]}]},{"img":"","id":"2","name":"\u5b89\u5fc3\u852c\u83dc","cat":[{"category_id":"9","name":"\u65b0\u9c9c\u852c\u83dc","brand":[{"brand_id":"12","brand_name":"\u6d4b\u8bd5\u4e13\u7528\u54c1\u724c"}
上面一段 结果中，我要用正则表达式提取 "id":"2"，正则表达式应该咋个写？