doucaigai7176
2016-04-14 09:17
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从Golang中的嵌套动态键json获取数据

I am new to go , I am trying to extract specific key from the json structure as below.

{
    "cluster_name": "escluster",
    "nodes": {
        "Sd2AvEXsswjTn6ErRYjg": {
            "timestamp": 1460624696217,
            "name": "master1",
            "transport_address": "10.0.0.1:9300",
            "host": "10.0.0.1:9300",
            "ip": [
                "10.0.0.1:9300",
                "NONE"
            ],
            "attributes": {
                "data": "false",
                "master": "true"
            },
            "os": {
                "timestamp": 1460624696217,
                "cpu_percent": 0,
                "load_average": 0,
                "mem": {
                    "total_in_bytes": 163987664,
                    "free_in_bytes": 136357264,
                    "used_in_bytes": 26629400,
                    "free_percent": 84,
                    "used_percent": 16
                },
                "swap": {
                    "total_in_bytes": 0,
                    "free_in_bytes": 0,
                    "used_in_bytes": 0
                }
            }
        },
        "yzabB-OaTfOqvgAELIMq1Q": {
            "timestamp": 1460624938213,
            "name": "data_1",
            "transport_address": "10.0.0.2:9300",
            "host": "10.0.0.2",
            "ip": [
                "10.0.0.2:9300",
                "NONE"
            ],
            "attributes": {
                "master": "false"
            },
            "os": {
                "timestamp": 1460624938213,
                "cpu_percent": 0,
                "load_average": 0.29,
                "mem": {
                    "total_in_bytes": 623840000,
                    "free_in_bytes": 4127648,
                    "used_in_bytes": 666012352,
                    "free_percent": 1,
                    "used_percent": 99
                },
                "swap": {
                    "total_in_bytes": 0,
                    "free_in_bytes": 0,
                    "used_in_bytes": 0
                }
            }
        },
        "q5CdgUF2TRewujr-0RPMgQ": {
            "timestamp": 1460624934417,
            "name": "master_0",
            "transport_address": "10.0.0.3:9300",
            "host": "10.0.0.2",
            "ip": [
                "10.0.0.3:9300",
                "NONE"
            ],
            "attributes": {
                "data": "false",
                "master": "true"
            },
            "os": {
                "timestamp": 1460624934417,
                "cpu_percent": 0,
                "load_average": 0,
                "mem": {
                    "total_in_bytes": 163898764,
                    "free_in_bytes": 139705616,
                    "used_in_bytes": 24194588,
                    "free_percent": 85,
                    "used_percent": 15
                },
                "swap": {
                    "total_in_bytes": 0,
                    "free_in_bytes": 0,
                    "used_in_bytes": 0
                }
            }
        }
    }
}      

As the node names are dynamic, I would like to retrieve mem for each node. I found this to retrieve data but its not dynamic key. How can we do this in go.

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