string 转 List<Map<string,List<Map<string,List<Map<string,string>>>>>>
时间: 2023-07-09 22:35:21 浏览: 166
Java Lambda List转Map代码实例
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这个转换过程比较复杂,需要按照字符串的格式进行解析。以下是一个可能的实现方式:
```java
public static List<Map<String, List<Map<String, List<Map<String, String>>>>>> convert(String input) {
List<Map<String, List<Map<String, List<Map<String, String>>>>>> result = new ArrayList<>();
// 先按照大括号和逗号分割字符串
String[] parts = input.split("[{},]");
int level = 0;
Map<String, List<Map<String, List<Map<String, String>>>>> currentMap = null;
List<Map<String, List<Map<String, String>>>> currentList = null;
Map<String, List<Map<String, String>>> innerMap = null;
List<Map<String, String>> innerList = null;
for (String part : parts) {
part = part.trim();
if (part.isEmpty()) {
continue;
}
if (part.equals("[")) {
if (level == 0) {
currentMap = new LinkedHashMap<>();
result.add(currentMap);
} else if (level == 1) {
currentList = new ArrayList<>();
currentMap.put(currentList.size() + "", currentList);
} else if (level == 2) {
innerMap = new LinkedHashMap<>();
currentList.add(innerMap);
} else if (level == 3) {
innerList = new ArrayList<>();
innerMap.put(innerList.size() + "", innerList);
}
level++;
} else if (part.equals("]")) {
level--;
if (level == 1) {
currentList = null;
} else if (level == 2) {
innerMap = null;
} else if (level == 3) {
innerList = null;
}
} else {
// 解析每个元素的 key 和 value
String[] kv = part.split(":");
String key = kv[0].trim().replaceAll("\"", "");
String value = kv[1].trim().replaceAll("\"", "");
if (level == 1) {
currentMap.put(key, new ArrayList<>());
} else if (level == 2) {
innerMap.put(key, new ArrayList<>());
} else if (level == 3) {
innerList.add(new LinkedHashMap<>());
} else if (level == 4) {
Map<String, String> innerInnerMap = new LinkedHashMap<>();
innerList.add(innerInnerMap);
String[] innerKv = value.split(",");
for (String innerPart : innerKv) {
String[] innerKv2 = innerPart.split(":");
String innerKey = innerKv2[0].trim().replaceAll("\"", "");
String innerValue = innerKv2[1].trim().replaceAll("\"", "");
innerInnerMap.put(innerKey, innerValue);
}
}
}
}
return result;
}
```
这个方法先按照大括号和逗号分割字符串,然后使用一个 `level` 变量记录当前解析到哪一层。对于每个元素,根据 `level` 的值来判断它是一个列表还是一个映射,然后递归解析。最后返回一个 `List<Map<String, List<Map<String, List<Map<String, String>>>>>>` 类型的结果。
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