Jackson JSON 格式不正确 [英] Jackson JSON Not Formatting Correctly

问题描述

我有这样的数据:

{
    "status": "success",
    "data": {
        "irrelevant": {
            "serialNumber": "XYZ",
            "version": "4.6"
        },
        "data": {
            "lib": {
                "files": [
                    "data1",
                    "data2",
                    "data3",
                    "data4" 
                ],
                "another file": [
                    "file.jar",
                    "lib.jar" 
                ],
                "dirs": []
            },
            "jvm": {
                "maxHeap": 10,
                "maxPermSize": "12"
            },
            "serverId": "134",
            "version": "2.3"
        }
    }
}

这是我用来美化 JSON 数据的函数:

Here is the function I'm using to prettify the JSON data:

public static String stringify(Object o, int space) {
    ObjectMapper mapper = new ObjectMapper();
    try {
        return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(o);
    } catch (Exception e) {
        return null;
    }
}

我正在使用 Jackson JSON 处理器将 JSON 数据格式化为字符串.出于某种原因，JSON 格式不是我需要的格式.将数据传递给该函数时，我得到的格式是这样的:

I am using the Jackson JSON Processor to format JSON data into a String. For some reason the JSON format is not in the format that I need. When passing the data to that function, the format I'm getting is this:

{
    "status": "success",
    "data": {
        "irrelevant": {
            "serialNumber": "XYZ",
            "version": "4.6"
        },
        "another data": {
            "lib": {
                "files": [ "data1", "data2", "data3", "data4" ],
                "another file": [ "file.jar", "lib.jar" ],
                "dirs": []
            },
            "jvm": {
                "maxHeap": 10,
                "maxPermSize": "12"
            },
            "serverId": "134",
            "version": "2.3"
        }
    }
}

正如您在另一个数据"对象下看到的那样，数组显示为一整行，而不是为数组中的每个项目显示一个新行.我不确定如何修改我的 stringify 函数以正确格式化 JSON 数据.

As you can see under the "another data" object, the arrays are displayed as one whole line instead of a new line for each item in the array. I'm not sure how to modify my stringify function for it to format the JSON data correctly.

推荐答案

你应该检查 DefaultPrettyPrinter 看起来像.这门课真正有趣的是 _arrayIndenter 属性.此属性的默认值为 FixedSpaceIndenter 类.你应该用 Lf2SpacesIndenter 类.

You should check how DefaultPrettyPrinter looks like. Really interesting in this class is the _arrayIndenter property. The default value for this property is FixedSpaceIndenter class. You should change it with Lf2SpacesIndenter class.

您的方法应如下所示:

public static String stringify(Object o) {
    try {
        ObjectMapper mapper = new ObjectMapper();
        DefaultPrettyPrinter printer = new DefaultPrettyPrinter();
        printer.indentArraysWith(new Lf2SpacesIndenter());
        return mapper.writer(printer).writeValueAsString(o);
    } catch (Exception e) {
        return null;
    }
}

这篇关于Jackson JSON 格式不正确的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！