谷歌Gson json序列化工具类,list, to string ,对象to string ,string to list

本是古典何须时尚 2021-11-17 01:08 352阅读 0赞

package com.baiyi.util;
    
    import com.google.gson.Gson;
    import com.google.gson.reflect.TypeToken;
    
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    /**
     * 字符串转化为json
     *
     * @author chenye
     * @date 2019/01/10
     */
    public class GsonJsonUtil {
        private static Gson gson = null;
    
        static {
            if (gson == null) {
                gson = new Gson();
            }
        }
    
        /**
         * 字符串转化为map
         *
         * @param string 字符串
         * @return map
         */
        public static Map<String, Object> stringToMapObject(String string) {
            Map map = new HashMap();
            if (gson != null) {
                map = gson.fromJson(string, new TypeToken<Map>() {
                }.getType());
            }
            return map;
        }
        /**
         * 字符串转化为map
         *
         * @param string 字符串
         * @return map
         */
        public static Map<String, String> stringToMap(String string) {
            Map<String, String> map = new HashMap();
            if (gson != null) {
                map = gson.fromJson(string, new TypeToken<Map>() {
                }.getType());
            }
            return map;
        }
    
        /**
         * 字符串转类
         *
         * @param string 字符串
         * @param clazz  类
         * @param <T>    t
         * @return t
         */
        public static <T> T stringToObject(String string, Class clazz) {
            return (T) gson.fromJson(string, clazz);
        }
    
        /**
         * 转成list
         *
         * @param string json字符串
         * @return list
         */
        public static <T> List<T> stringToList(String string) {
            List<T> list = null;
            if (gson != null) {
                list = gson.fromJson(string, new TypeToken<List<T>>() {
                }.getType());
            }
            return list;
        }
    
        /**
         * 字符串转化为map
         *
         * @param string json字符串
         * @return list
         */
        public static List<Map> stringToListMap(String string) {
            List<Map> list = null;
            if (gson != null) {
                list = gson.fromJson(string, new TypeToken<List<Map>>() {
                }.getType());
            }
            return list;
        }
    
        /**
         * 转成json
         *
         * @param object
         * @return
         */
        public static String objectToJsonString(Object object) {
            String gsonString = null;
            if (gson != null) {
                gsonString = gson.toJson(object);
            }
            return gsonString;
        }
    }

需要的jar

<dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
    </dependency>