[英]Convert Complex JSON To CSV file using JOLT
我是 JOLT 的新手,对此了解不多,我需要 JOLT 规范来将我的以下 JSON 文件转换为 CSV 文件:
{
"bigRecords": [
{
"Records": {
"Name": "R1",
"Id": "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"Type": "New",
"Area": "Eng",
"createdAt": "11-10-2022 06:10:00",
"deletedDate": "11-10-2022 06:20:00",
"deleted": true,
"deletedBy": "userId",
"createdBy": "userId"
},
"ancestors": [
{
"Name": "P1",
"Type": "DELETE",
"sta": "",
"some": "",
"Id": "1"
}
]
},
{
"Records": {
"Name": "R2",
"Id": "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"Type": "DRAFT",
"Area": "Eng",
"createdAt": "11-10-2022 06:10:00",
"deletedDate": "11-10-2022 06:20:00",
"deleted": true,
"deletedBy": "userId",
"createdBy": "userId"
},
"dependentRecords": [
{
"Name": "P3",
"Type": "DELETE",
"sta": "1P0",
"some": "1P02",
"Id": "1P0"
}
]
}
]
}
请帮助我使用 JOlT 库将复杂的 json 转换为 CSV,或者我可以在 spring 启动时使用任何其他方式实现此目的?
您拥有易于使用的 JsonFlattener。 https://github.com/wnameless/json-flattener
Map<String, Object> flattenJson = JsonFlattener.flattenAsMap(json);
System.out.println(flattenJson);
// {ab=1, ac=null, ad[0]=false, ad[1]=true, e=f, g=2.3}
库乔森有flatten()
function。它还有function unflatten()
来反转操作。
https://github.com/octomix/josson
反序列化
Josson josson = Josson.fromJsonString(
"{" +
" \"bigRecords\": [" +
" {" +
" \"Records\": {" +
" \"Name\": \"R1\"," +
" \"Id\": \"1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01\"," +
" \"Type\": \"New\"," +
" \"Area\": \"Eng\"," +
" \"createdAt\": \"11-10-2022 06:10:00\"," +
" \"deletedDate\": \"11-10-2022 06:20:00\"," +
" \"deleted\": true," +
" \"deletedBy\": \"userId\"," +
" \"createdBy\": \"userId\"" +
" " +
" }," +
" \"ancestors\": [" +
" {" +
" \"Name\": \"P1\"," +
" \"Type\": \"DELETE\"," +
" \"sta\": \"\"," +
" \"some\": \"\"," +
" \"Id\": \"1\"" +
" }" +
" ]" +
" }, {" +
" \"Records\": {" +
" \"Name\": \"R2\"," +
" \"Id\": \"1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01\"," +
" \"Type\": \"DRAFT\"," +
" \"Area\": \"Eng\"," +
" \"createdAt\": \"11-10-2022 06:10:00\"," +
" \"deletedDate\": \"11-10-2022 06:20:00\"," +
" \"deleted\": true," +
" \"deletedBy\": \"userId\"," +
" \"createdBy\": \"userId\"" +
" }," +
" \"dependentRecords\": [" +
" {" +
" \"Name\": \"P3\"," +
" \"Type\": \"DELETE\"," +
" \"sta\": \"1P0\"," +
" \"some\": \"1P02\"," +
" \"Id\": \"1P0\"" +
" }" +
" ]" +
" }" +
" ]" +
"}");
款式一
JsonNode node = josson.getNode("flatten('.','[%d]')");
System.out.println(node.toPrettyString());
Output
{
"bigRecords[0].Records.Name" : "R1",
"bigRecords[0].Records.Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords[0].Records.Type" : "New",
"bigRecords[0].Records.Area" : "Eng",
"bigRecords[0].Records.createdAt" : "11-10-2022 06:10:00",
"bigRecords[0].Records.deletedDate" : "11-10-2022 06:20:00",
"bigRecords[0].Records.deleted" : true,
"bigRecords[0].Records.deletedBy" : "userId",
"bigRecords[0].Records.createdBy" : "userId",
"bigRecords[0].ancestors[0].Name" : "P1",
"bigRecords[0].ancestors[0].Type" : "DELETE",
"bigRecords[0].ancestors[0].sta" : "",
"bigRecords[0].ancestors[0].some" : "",
"bigRecords[0].ancestors[0].Id" : "1",
"bigRecords[1].Records.Name" : "R2",
"bigRecords[1].Records.Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords[1].Records.Type" : "DRAFT",
"bigRecords[1].Records.Area" : "Eng",
"bigRecords[1].Records.createdAt" : "11-10-2022 06:10:00",
"bigRecords[1].Records.deletedDate" : "11-10-2022 06:20:00",
"bigRecords[1].Records.deleted" : true,
"bigRecords[1].Records.deletedBy" : "userId",
"bigRecords[1].Records.createdBy" : "userId",
"bigRecords[1].dependentRecords[0].Name" : "P3",
"bigRecords[1].dependentRecords[0].Type" : "DELETE",
"bigRecords[1].dependentRecords[0].sta" : "1P0",
"bigRecords[1].dependentRecords[0].some" : "1P02",
"bigRecords[1].dependentRecords[0].Id" : "1P0"
}
样式 2
JsonNode node = josson.getNode("flatten('_')");
System.out.println(node.toPrettyString());
Output
{
"bigRecords_0_Records_Name" : "R1",
"bigRecords_0_Records_Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords_0_Records_Type" : "New",
"bigRecords_0_Records_Area" : "Eng",
"bigRecords_0_Records_createdAt" : "11-10-2022 06:10:00",
"bigRecords_0_Records_deletedDate" : "11-10-2022 06:20:00",
"bigRecords_0_Records_deleted" : true,
"bigRecords_0_Records_deletedBy" : "userId",
"bigRecords_0_Records_createdBy" : "userId",
"bigRecords_0_ancestors_0_Name" : "P1",
"bigRecords_0_ancestors_0_Type" : "DELETE",
"bigRecords_0_ancestors_0_sta" : "",
"bigRecords_0_ancestors_0_some" : "",
"bigRecords_0_ancestors_0_Id" : "1",
"bigRecords_1_Records_Name" : "R2",
"bigRecords_1_Records_Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords_1_Records_Type" : "DRAFT",
"bigRecords_1_Records_Area" : "Eng",
"bigRecords_1_Records_createdAt" : "11-10-2022 06:10:00",
"bigRecords_1_Records_deletedDate" : "11-10-2022 06:20:00",
"bigRecords_1_Records_deleted" : true,
"bigRecords_1_Records_deletedBy" : "userId",
"bigRecords_1_Records_createdBy" : "userId",
"bigRecords_1_dependentRecords_0_Name" : "P3",
"bigRecords_1_dependentRecords_0_Type" : "DELETE",
"bigRecords_1_dependentRecords_0_sta" : "1P0",
"bigRecords_1_dependentRecords_0_some" : "1P02",
"bigRecords_1_dependentRecords_0_Id" : "1P0"
}
通过使用Jolt
;
您可以通过叶子的各自深度来分隔级别,并且平铺下划线分隔的符号是节点代表,以便使整个 JSON 变平,例如
[
{
"operation": "shift",
"spec": {
"*": {
"*": {// the level of the indexes of the array
"Reco*": {
"*": {
"@": "&4_&3_&2_&" // & : the replicator of the current level value, &2, &3, ... represents going respective 2, 3 levels up the tree
}
},
"*": {// else case -> keys other than "Records"
"*": {// the level of the indexes of the respective arrays
"*": {
"@": "&5_&4_&3_&2_&"
}
}
}
}
}
}
}
]
哪个产量
{
"bigRecords_0_Records_Name" : "R1",
"bigRecords_0_Records_Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords_0_Records_Type" : "New",
"bigRecords_0_Records_Area" : "Eng",
"bigRecords_0_Records_createdAt" : "11-10-2022 06:10:00",
"bigRecords_0_Records_deletedDate" : "11-10-2022 06:20:00",
"bigRecords_0_Records_deleted" : true,
"bigRecords_0_Records_deletedBy" : "userId",
"bigRecords_0_Records_createdBy" : "userId",
"bigRecords_0_ancestors_0_Name" : "P1",
"bigRecords_0_ancestors_0_Type" : "DELETE",
"bigRecords_0_ancestors_0_sta" : "",
"bigRecords_0_ancestors_0_some" : "",
"bigRecords_0_ancestors_0_Id" : "1",
"bigRecords_1_Records_Name" : "R2",
"bigRecords_1_Records_Id" : "1P02XV425KCASEZGQLB8LPQMF4ZXCUBCTA01",
"bigRecords_1_Records_Type" : "DRAFT",
"bigRecords_1_Records_Area" : "Eng",
"bigRecords_1_Records_createdAt" : "11-10-2022 06:10:00",
"bigRecords_1_Records_deletedDate" : "11-10-2022 06:20:00",
"bigRecords_1_Records_deleted" : true,
"bigRecords_1_Records_deletedBy" : "userId",
"bigRecords_1_Records_createdBy" : "userId",
"bigRecords_1_dependentRecords_0_Name" : "P3",
"bigRecords_1_dependentRecords_0_Type" : "DELETE",
"bigRecords_1_dependentRecords_0_sta" : "1P0",
"bigRecords_1_dependentRecords_0_some" : "1P02",
"bigRecords_1_dependentRecords_0_Id" : "1P0"
}
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