private static ObjectMapper objectMapper = new ObjectMapper();/*** 示例1：* List<Map<Integer, String>> list = Lists.newArrayList();* Map<Integer, String> map = Maps.newHashMap();* map.put(12, "gg");* map.put(34, "sd");* list.add(map);* List<Map<Integer, String>> list1 = toJavaBean(JSONUtils.toJSONString(list), ArrayList.class, HashMap.class);* 示例2：* Map<Integer, String> map = Maps.newHashMap();* map.put(12, "gg");* map.put(34, "sd");* Map<Integer, String> map1 = toJavaBean(JSONUtils.toJSONString(map), HashMap.class, Integer.class, String.class);* @param jsonString JSON字符串* @param parametrized 数据类型最外层class或者泛型实际的class, 如List<Map<String, Integer>>的List.class 或者Map<String, Integer>中的Map.class* @param parameterClasses 参数内部类型，如List<Map<String, Object>中的Map.class 或者Map<String, Integer>中的String.class、Integer.class* @param <T>* @return*/public static <T> T toJavaBean(String jsonString, Class<?> parametrized, Class<?>... parameterClasses){try{JavaType javaType = javaType(parametrized, parameterClasses);return objectMapper.readValue(jsonString, javaType);} catch (JsonParseException e){e.printStackTrace();LoggerUtil.error(JSONUtils.class, e.toString());} catch (JsonMappingException e){e.printStackTrace();LoggerUtil.error(JSONUtils.class, e.toString());} catch (IOException e){e.printStackTrace();LoggerUtil.error(JSONUtils.class, e.toString());}return null;}/*** 示例1：* Map<Integer, String> map = Maps.newHashMap();* JavaType javaType = javaType(Map.class, Integer.class, String.class);* 示例2：* List<Map<Integer, String>> list = Lists.newArrayList();* Map<Integer, String> map = Maps.newHashMap();* map.put(12, "gg");* map.put(34, "sd");* list.add(map);* JavaType javaType = javaType(List.class, Map.class);* @param parametrized 实际的数据类型，即最外层数据类型List* @param parameterClasses 内部参数类型，即Set.class Bean.class* @return*/public static JavaType javaType(Class<?> parametrized, Class<?>... parameterClasses){return objectMapper.getTypeFactory().constructParametricType(parametrized, parameterClasses);}
上面只列出了工具包的部分代码，其它的可以参考我的源码；
GitHub源码地址：/mingyang66/spring-parent
