Question

我有两个json文件。我需要解析并将json加入到单个结构中

lineage.json

{
   "lineage": [{
        "sourceColumnId": "VMB_BESTADDRESS.SNAPSHOT_TS",
        "description": "",
        "targetColumnId": "VMB_BESTADDRESSUSAGE.NXREINS"
    },
    {
        "sourceColumnId": "DSL_RECORD_SOURCES.MAMACT",
        "description": "",
        "targetColumnId": "G2_ZUMADF00.MAMACT"
    },
    {
        "sourceColumnId": "DSL_RECORD_SOURCES.MAMADE",
        "description": "",
        "targetColumnId": "G2_ZUMADF00.HDF_S_POL_GEN"
    }]
}

column.json

{
    "column": [{
        "ID": 39700,
        "columnId": "VMB_BESTADDRESS.SNAPSHOT_TS",
        "column": "SNAPSHOT_TS",
        "dataType": "String",
        "length": "",
        "table": "VMB_BESTADDRESS",
    },
    {
        "ID": 39701,
        "columnId": "VMB_BESTADDRESSUSAGE.NXREINS",
        "column": "NXREINS",
        "dataType": "String",
        "length": "",
        "table": "VMB_BESTADDRESSUSAGE",

    },
    {
        "ID": 39702,
        "columnId": "VMB_BESTADDRESSUSAGE.PKADDRESSCODE",
        "column": "PKADDRESSCODE",
        "dataType": "String",
        "length": "",
        "table": "VMB_BESTADDRESSUSAGE",
    }]
}

我需要加入两个jsons，以便对于列中的sourcecolumnId和targetcolumnid的每个匹配，必须填充以下json结构

{
    output:{
        sourceColumnId:VMB_BESTADDRESS.SNAPSHOT_TS,
        sourceColumnName:SNAPSHOT_TS,
        targetColumnId:VMB_BESTADDRESSUSAGE.NXREINS,
        targetColumnNameNXREINS,
    }
}

我需要连接查找两个json以获得输出

sourceColumnName - ＆gt; column.json的列名，其columnId和sourceColumnId相同。类似地，对于targetcolumnName也是。

Answer 1

    String str = "xxx";     // column.json

    JSONArray jsonArrayColumn = JSON.parseObject(str);
    Map<String, JSONObject> column = new HashMap();     // {id:name}
    for(int i = 0; i < jsonArrayColumn.size(); i++){    // loop
        JSONObject obj = jsonArrayColumn.getJSONObject(i);
        column.put(obj.getString("columnId"), obj.getString("column"));
    }

    String str2 = "xxx";    // lineage.json
    JSONArray jsonArrayLineage = JSON.parseObject(str2);

    JSONArray resultArray = new JSONArray();
    for(int i = 0; i < jsonArrayLineage.size(); i++){   // loop
        JSONObject lineageObj = jsonArrayLineage.getJSONObject(i);
        JSONObject obj = new JSONObject();
        obj.put("sourceColumnId", lineageObj.get("sourceColumnId"));
        obj.put("sourceColumnName", column.get(lineageObj.get("sourceColumnId")));
        obj.put("targetColumnId", lineageObj.get("targetColumnId"));
        obj.put("targetColumnName", column.get(lineageObj.get("targetColumnId")));
    }

resultArray就是你想要的。

根据元素加入两个jsons

1 个答案: