JsonUtil (myserverless 4.0 API)

Fields
Modifier and Type	Field and Description
`static com.fasterxml.jackson.databind.ObjectMapper`	`singleTonObjectMapper_NON_NULL`

Constructors
Constructor and Description
`JsonUtil()`

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static String`	`formatJSON(String input)` 把json字符串格式化, 如失败返回null
`static Object`	`get(Object obj, String nodeKey)` 如果一个obj是Map/list/基本类型或它们的组合，用下面语法读取节点对象： Object obj = JsonUtil.get(json,"node1.node2.x.node4"); //x表示列表下标序号如获取失败返回null
`static String`	`getAsText(com.fasterxml.jackson.databind.JsonNode node, String field)`
`static String`	`toJSON(Object object)` 把object转为json, 如失败返回null
`static String`	`toJSONFormatted(Object object)` 把object转为格式化json, 如失败返回null
`static <T> T`	`toObj(String json, Class<T> claz)` 把json字符串转为指定类的实例对象, 如失败返回null

public static final com.fasterxml.jackson.databind.ObjectMapper singleTonObjectMapper_NON_NULL

public static <T> T toObj(String json,
                          Class<T> claz)

把json字符串转为指定类的实例对象, 如失败返回null

public static String toJSON(Object object)

把object转为json, 如失败返回null

toJSONFormatted
```
public static String toJSONFormatted(Object object)
```
把object转为格式化json, 如失败返回null

formatJSON
```
public static String formatJSON(String input)
```
把json字符串格式化, 如失败返回null

public static String getAsText(com.fasterxml.jackson.databind.JsonNode node,
                               String field)

Class JsonUtil