java - map轉 json字符串

// map轉 json字符串
System.out.println(JSONObject.toJSONString(params));

maven依賴

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>

如何將JSONArray轉為String數組