将点分隔的字符串转换为JSON对象 [英] Convert a dot seperated string into a JSON Object
问题描述
所以我有一个点分隔的字符串,我试图在JAVA中转换为JSON对象。结构如下。
So i have a dot seperated string which i am trying to convert into a JSON Object in JAVA. The structure is as follows.
Person.City.FirstNm.LastNm=xyz, Person.City.Address=abc. Person.City.firstNm.Salary=1000.24, Person.State.FirstNm.LastNm=xyz
等等上。生成的JSON应该是这样的。请注意,值中可以有小数点。
and so on. The resulting JSON should be something like this. Note there can be a decimal point in the value.
{
Person:
{
City:
{
firstNm:
{
LastNm:xyz,
Salary:1000.24
},
Address: abc
},
State:
{
FirstNm:
{
LastNm:xyz
}
}
}
}
我试图从字符串中创建一个Map然后用它来制作一个JSON字符串我可以使用它作为一个对象,但没有运气。任何帮助,将不胜感激。谢谢
I have tried to make a Map from the string and then use it to make a JSON string which i can use to make it as an Object but no luck. Any help would be appreciated. Thanks
推荐答案
您需要构建树状结构来存储对象。比,只需 toString()
就可以了。以下是我看到你可以做到的事情:
You need to build tree-like structure for storing objects. Than, just toString()
it. Below is how I see you can do it:
public class TestJson {
static abstract class Node {
}
static class IntermediateNode extends Node {
public Map<String, Node> keyValueMap = new LinkedHashMap<>();
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("{");
sb.append(keyValueMap.entrySet().stream().map(entry -> entry.getKey() + " : " + entry.getValue())
.collect(Collectors.joining(", ")));
sb.append("}");
return sb.toString();
}
}
static class LeafNode extends Node {
public String value;
@Override
public String toString() {
return value;
}
}
public static void main(String[] args) {
String testString =
"Person.City.FirstNm.LastNm=xyz, Person.City.Address=abc, Person.City.FirstNm.Salary=1000.24, Person"
+ ".State.FirstNm.LastNm=xyz";
IntermediateNode root = new IntermediateNode();
for (String param : testString.replaceAll(" ", "").split(",")) {
String[] def = param.split("=");
String[] result = def[0].split("\\.");
IntermediateNode currentNode = root;
for (int i = 0; i < result.length - 1; i++) {
Node node = currentNode.keyValueMap.get(result[i]);
if (node == null) {
IntermediateNode child = new IntermediateNode();
currentNode.keyValueMap.put(result[i].trim(), child);
currentNode = child;
} else {
currentNode = (IntermediateNode) node;
}
}
LeafNode leaf = new LeafNode();
leaf.value = def[1];
currentNode.keyValueMap.put(result[result.length - 1], leaf);
}
System.out.println(root);
}
}
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