java treemap 转json
时间: 2023-08-30 12:10:55 浏览: 56
可以使用JSON库将Java TreeMap转换为JSON字符串,例如使用Jackson库的ObjectMapper类的writeValueAsString()方法。具体代码示例可以参考以下代码:
```
import java.util.TreeMap;
import com.fasterxml.jackson.databind.ObjectMapper;
public class TreeMapToJsonExample {
public static void main(String[] args) throws Exception {
// Create a TreeMap
TreeMap<String, Integer> treeMap = new TreeMap<>();
treeMap.put("apple", 10);
treeMap.put("banana", 20);
treeMap.put("orange", 30);
// Convert TreeMap to JSON
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(treeMap);
System.out.println(json);
}
}
```
输出结果为:
```
{"apple":10,"banana":20,"orange":30}
```