Question

我有一个json记录列表，例如：

[{“age”:27,”lastname”:”Robert “,”firstName”:”Rob”,”company”:”abc”},

{“age”:27,”lastname”:”Ashok “,”firstName”:”Bob”,”company”:”def”},

{“age”:27,”lastname”:”murali“,”firstName”:”Got”,”company”,”Ghori”}]

编写一个使用lastName作为参数的方法，并基于该输入，我只需要获取该特定记录并使其显示

Answer 1

您的问题没有得到很好的解释，您可以尝试此解决方案（将字符串更正为真正的json内容之后）

使用ObjectMapper，您可以读取字符串以将其转换为ArrayNode

public static void main(String[] args) throws IOException {
    String json= "[\n" +
                    "   {\n" +
                    "      \"age\":27,\n" +
                    "      \"lastname\":\"Robert \",\n" +
                    "      \"firstName\":\"Rob\",\n" +
                    "      \"company\":\"abc\"\n" +
                    "   },\n" +
                    "   {\n" +
                    "      \"age\":27,\n" +
                    "      \"lastname\":\"Ashok \",\n" +
                    "      \"firstName\":\"Bob\",\n" +
                    "      \"company\":\"def\"\n" +
                    "   },\n" +
                    "   {\n" +
                    "      \"age\":27,\n" +
                    "      \"lastname\":\"murali\",\n" +
                    "      \"firstName\":\"Got\",\n" +
                    "      \"company\":\"\"\n" +
                    "   }\n" +
                    "]";
    // example with murali
    getLine(json, "murali");
}

private static String getLine(String json, String lastName) throws IOException {
    ArrayNode rootNode = (ArrayNode) new ObjectMapper().readTree(json);
    for(JsonNode jsonNode : rootNode) {
        ObjectNode node = (ObjectNode)jsonNode;
        String lastNameValue = node.get("lastname").textValue();
        if(lastName.equals(lastNameValue)){
            return jsonNode.toString();
        }
    }
    return null;
}

此示例的结果是：

{“ age”：27，“ lastname”：“ murali”，“ firstName”：“ Got”，“ company”：“”}

Json记录列表

1 个答案: