com.xiaoleilu.hutool.json

类 JSONUtil

java.lang.Object

com.xiaoleilu.hutool.json.JSONUtil

public class JSONUtil
extends Object

JSON工具类

作者:

Looly

构造器概要

构造器

构造器和说明
JSONUtil()

方法概要

方法

限定符和类型	方法和说明
protected static void	indent(Writer writer, int indent) 缩进，使用空格符
protected static String	numberToString(Number number) Produce a string from a Number.
static JSONObject	parse(String jsonStr) JSON字符串转JSONObject对象
static JSONArray	parseArray(String jsonStr) JSON字符串转JSONArray
static String	quote(String string) 对所有双引号做转义处理（使用双反斜杠做转义） 为了能在HTML中较好的显示，会将</转义为<\/ JSON字符串中不能包含控制字符和未经转义的引号和反斜杠
static Writer	quote(String string, Writer writer) 对所有双引号做转义处理（使用双反斜杠做转义） 为了能在HTML中较好的显示，会将</转义为<\/ JSON字符串中不能包含控制字符和未经转义的引号和反斜杠
protected static Object	stringToValue(String string) Try to convert a string into a number, boolean, or null.
protected static void	testValidity(Object obj) 如果对象是Number 且是 NaN or infinite，将抛出异常
static <T> T	toBean(JSONObject json, Class<T> beanClass) 转为实体类对象
static String	toJsonPrettyStr(JSONArray jsonArray) 转为格式化后的JSON字符串
static String	toJsonPrettyStr(JSONObject jsonObject) 转为格式化后的JSON字符串
static String	toJsonStr(JSONArray jsonArray) 转为JSON字符串
static String	toJsonStr(JSONObject jsonObject) 转为JSON字符串
protected static String	valueToString(Object value) Make a JSON text of an Object value.
static Object	wrap(Object object) 在需要的时候包装对象 If null -> JSONNull.NULL If it is an array or collection, wrap it in a JSONArray.
protected static Writer	writeValue(Writer writer, Object value, int indentFactor, int indent) 写入值到Writer

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

JSONUtil

public JSONUtil()

方法详细资料

parse

public static JSONObject parse(String jsonStr)

JSON字符串转JSONObject对象

参数:

jsonStr - JSON字符串

返回:

JSONObject

parseArray

public static JSONArray parseArray(String jsonStr)

JSON字符串转JSONArray

参数:

jsonStr - JSON字符串

返回:

JSONArray

toJsonStr

public static String toJsonStr(JSONObject jsonObject)

转为JSON字符串

参数:

jsonObject - JSONObject

返回:

JSON字符串

toJsonStr

public static String toJsonStr(JSONArray jsonArray)

转为JSON字符串

参数:

jsonArray - JSONArray

返回:

JSON字符串

toJsonPrettyStr

public static String toJsonPrettyStr(JSONObject jsonObject)

转为格式化后的JSON字符串

参数:

jsonObject - JSONObject

返回:

JSON字符串

toJsonPrettyStr

public static String toJsonPrettyStr(JSONArray jsonArray)

转为格式化后的JSON字符串

参数:

jsonArray - JSONArray

返回:

JSON字符串

toBean

public static <T> T toBean(JSONObject json,
           Class<T> beanClass)

转为实体类对象

参数:

json - JSONObject

beanClass - 实体类对象

返回:

实体类对象

quote

public static String quote(String string)

对所有双引号做转义处理（使用双反斜杠做转义）
为了能在HTML中较好的显示，会将</转义为<\/
JSON字符串中不能包含控制字符和未经转义的引号和反斜杠

参数:

string - A String

返回:

A String correctly formatted for insertion in a JSON text.

quote

public static Writer quote(String string,
           Writer writer)
                    throws IOException

对所有双引号做转义处理（使用双反斜杠做转义）
为了能在HTML中较好的显示，会将</转义为<\/
JSON字符串中不能包含控制字符和未经转义的引号和反斜杠

参数:

string - A String

writer - Writer

返回:

A String correctly formatted for insertion in a JSON text.

抛出:

IOException

wrap

public static Object wrap(Object object)

在需要的时候包装对象
If null -> JSONNull.NULL
If it is an array or collection, wrap it in a JSONArray.
If it is a map, wrap it in a JSONObject.
If it is a standard property (Double, String, et al) then it is already wrapped.
Otherwise, if it comes from one of the java packages, turn it into a string.
And if it doesn't, try to wrap it in a JSONObject. If the wrapping fails, then null is returned.

参数:

object - The object to wrap

返回:

The wrapped value

writeValue

protected static final Writer writeValue(Writer writer,
                Object value,
                int indentFactor,
                int indent)
                                  throws JSONException,
                                         IOException

写入值到Writer

参数:

writer - Writer

value - 值

indentFactor -

indent - 缩进空格数

返回:

Writer

抛出:

JSONException

IOException

indent

protected static final void indent(Writer writer,
          int indent)
                            throws IOException

缩进，使用空格符

参数:

writer -

indent -

抛出:

IOException

numberToString

protected static String numberToString(Number number)
                                throws JSONException

Produce a string from a Number.

参数:

number - A Number

返回:

A String.

抛出:

JSONException - If n is a non-finite number.

testValidity

protected static void testValidity(Object obj)
                            throws JSONException

如果对象是Number 且是 NaN or infinite，将抛出异常

参数:

obj - 被检查的对象

抛出:

JSONException - If o is a non-finite number.

valueToString

protected static String valueToString(Object value)
                               throws JSONException

Make a JSON text of an Object value.
If the object has an value.toJSONString() method, then that method will be used to produce the JSON text.
The method is required to produce a strictly conforming text.
If the object does not contain a toJSONString method (which is the most common case), then a text will be produced by other means.
If the value is an array or Collection, then a JSONArray will be made from it and its toJSONString method will be called.
If the value is a MAP, then a JSONObject will be made from it and its toJSONString method will be called.
Otherwise, the value's toString method will be called, and the result will be quoted.

Warning: This method assumes that the data structure is acyclical.

参数:

value - The value to be serialized.

返回:

a printable, displayable, transmittable representation of the object, beginning with { (left brace) and ending with } (right brace).

抛出:

JSONException - If the value is or contains an invalid number.

stringToValue

protected static Object stringToValue(String string)

Try to convert a string into a number, boolean, or null. If the string can't be converted, return the string.

参数:

string - A String.

返回:

A simple JSON value.