使用ObjectMapper对java对象和Map进行json格式转换

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u011311291/article/details/87874363

依赖包
1.jackson-core-asl-1.9.13.jar
2.jackson-mapper-asl-1.9.13.jar

public class Test {

	public static void main(String[] args) throws Exception
	{
		ObjectMapper o = new ObjectMapper();
    	Student std = new Student("张三",20);
		String out1 = o.writeValueAsString(std);
		System.out.println(out1);
		Map<String,Integer> map = new HashMap<String,Integer>();
		map.put("李四", 30);
		map.put("王五", 40);
		String out2 = o.writeValueAsString(map);
		System.out.println(out2);
	}
}

{"name":"张三","age":20}
{"李四":30,"王五":40}