使用Java Spring Boot获取Json的items值

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

@RestController
public class JsonController {

    @GetMapping("/json")
    public String getJsonItems() {
        String json = "{\"items\": [\"item1\", \"item2\", \"item3\"]}";
        
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode rootNode = objectMapper.readTree(json);
            JsonNode itemsNode = rootNode.get("items");
            
            // 获取items值
            String[] items = objectMapper.convertValue(itemsNode, String[].class);
            
            // 返回items值
            return String.join(", ", items);
        } catch (Exception e) {
            e.printStackTrace();
            return "Error occurred";
        }
    }
}