Java Object List Map 转Json学习

2019-11-08 03:10:21

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最近学习的java object List Map转Json代码：

import com.sdicons.json.mapper.JSONMapper;import com.sdicons.json.mapper.MapperException;import com.sdicons.json.model.JSONValue;import java.util.List;import java.util.Map;import java.util.Set;public class test { //java object转json public static String obj2Json(Object obj) throws MapperException { JSONValue jsonValue = JSONMapper.toJSON(obj); String jsonStr = jsonValue.render(false); return jsonStr; } //java list 转json public static String obj2Json(List<Class<?>> list) throws MapperException { if (list == null || list.size() == 0) { return "{}"; } StringBuilder jsonString = new StringBuilder(); for (int i = 0; i < list.size(); i++) { if (i != 0) { jsonString.append(","); } Class<?> cla = list.get(i); jsonString.append(obj2Json(cla)); // jsonString.append(obj2Json(cla, false)); } return jsonString.toString(); } //java map 转json public static String obj2Json(Map<String, Class<?>> map) throws MapperException { if (map == null || map.size() == 0) { return "{}"; } StringBuilder jsonString = new StringBuilder(); Set<String> keySet = map.keySet(); boolean isFirst = true; for (String key : keySet) { if (isFirst) { isFirst = false; } else { jsonString.append(","); } Class<?> cla = map.get(key); jsonString.append(obj2Json(cla)); } return jsonString.toString(); }}

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