java将Map或List

java将Map或List<Map>转json字符串
解决方法：
首先maven引入fastjson jar依赖包：
<dependency>   
    <groupId>com.alibaba</groupId>   
    <artifactId>fastjson</artifactId>   
    <version>1.2.24</version>
</dependency>

List<Map> listMap = new ArrayList<Map>();
Map map1 = new HashMap();
map1.put("小明","员工");
map1.put("小军","主管");
String jsonString1= JSON.toJSONString(map1);
System.out.println(jsonString1);

Map map2 = new HashMap();
map2.put("小王", "员工");
map2.put("小红", "主管");

listMap.add(map1);
listMap.add(map2);
String jsonString2= JSON.toJSONString(listMap);
System.out.println(jsonString2);

输出：

jsonString1转化后：{"小明":"员工","小军":"主管"}

jsonString2转化后：[{"小明":"员工","小军":"主管"},{"小王":"员工","小红":"主管"}]

顶

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