org.anyline.util

类 BeanUtil

java.lang.Object

org.anyline.util.BeanUtil

public class BeanUtil
extends Object

字段概要

字段

限定符和类型	字段和说明
static com.fasterxml.jackson.databind.ObjectMapper	JSON_MAPPER

构造器概要

构造器

构造器和说明
BeanUtil()

方法概要

限定符和类型	方法和说明
static <T> List<T>	array2list(T[]... arrays)
static Map<String,String>	array2map(String... params)
static String	camel_(String str) 驼峰转下划线 userName : user_name
static String	camel(String key)
static String	Camel(String key)
static String	camel(String key, boolean hold) 转驼峰
static String	Camel(String key, boolean hold)
static String	checkTable(Class<?> clazz)
static void	clearEmpty(List<Object> list)
static void	clearEmpty(List<Object> list, boolean recursion) 删除空值
static void	clearEmpty(Map<String,Object> map)
static void	clearEmpty(Map<String,Object> map, boolean recursion) 删除空值
static int	closest(BigDecimal[] array, BigDecimal value)
static int	closest(double[] array, double value)
static int	closest(Double[] array, double value)
static int	closest(float[] array, float value)
static int	closest(Float[] array, float value)
static int	closest(int[] array, int value)
static int	closest(Integer[] array, int value)
static int	closest(List<BigDecimal> array, BigDecimal value)
static int	closest(List<Double> array, double value)
static int	closest(List<Float> array, float value)
static int	closest(List<Integer> array, int value)
static int	closest(List<Long> array, long value)
static int	closest(List<Short> array, short value)
static int	closest(long[] array, long value)
static int	closest(Long[] array, long value)
static int	closest(short[] array, short value) 集合中与value差值最小的成员的下标
static int	closest(Short[] array, short value)
static String	concat(double[] list)
static String	concat(double[] list, String split)
static String	concat(float[] list)
static String	concat(float[] list, String split)
static String	concat(int[] list)
static String	concat(int[] list, String split)
static String	concat(List<?> list)
static String	concat(List<?> list, String split)
static String	concat(List<?> list, String key, String split) 数组拼接成字符串
static String	concat(long[] list)
static String	concat(long[] list, String split)
static String	concat(short[] list)
static String	concat(short[] list, String split)
static <T> String	concat(T[] list)
static <T> String	concat(T[] list, String split)
static <T> String	concat(T[] list, String key, String split)
static <T> boolean	contain(Collection<T> list, T obj, List<String> keys)
static <T> boolean	contain(Collection<T> list, T obj, String... keys) 是否包含
static Map<String,Object>	copy(Map<String,Object> src, Map<String,Object> copy)
static Map<String,Object>	copy(Map<String,Object> src, Map<String,Object> copy, List<String> keys)
static Map<String,Object>	copy(Map<String,Object> src, Map<String,Object> copy, String... keys)
static Map<String,String>	createMap(String... params)
static <T> List<T>	cuts(Collection<T> list, int begin, int end) 集合截取
static <T> List<List<T>>	descartes(List<List<T>> lists) 合成笛卡尔组合
static Object	deserialize(byte[] in)
static <T> Collection<T>	distinct(Collection<T> list, List<String> keys)
static <T> Collection<T>	distinct(Collection<T> list, String... keys) 去重
static <T> boolean	equals(T obj1, T obj2, List<String> keys)
static <T> boolean	equals(T obj1, T obj2, String... keys)
static Object	evl(Object src, String... keys)
static List<Object>	extract(Collection<?> list, String key) 提取集合中每个条目的key属性的值 如提取用户列表中的所有用户ID
static Object	extract(Object src, boolean voluntary, String... keys) 递归提取src中的value 如 { key1:{ key11:{ key111:111 //提取111 recursion(map,key1,key11,key111) }, key12:{ key121:{ key1211:1211, key1212:1212 //提取1212 recursion(map,key1, key12, key121, key1212) } } } }
static Object	extract(Object src, String... keys)
static List<Map<String,Object>>	extracts(Collection<?> list, String... keys) 提取集合中每个条目的多个key属性的值 如提取用户列表中的所有用户ID,CODE
static Collection<Object>	fetch(Collection<Object> objs, String... keys) 提取指定属性值
static Object	fetch(Object obj, String... keys)
static Object	getAnnotationValue(Field field, Class clazz, String property) 属性注解值
static List<Class>	getClasses(String pack, Class... bases) pack包下的所有类 不包括jar包中定义类
static String	getColumn(Class<?> clazz, String field, boolean checkInsert, boolean checkUpdate)
static String	getColumn(Field field, boolean checkInsert, boolean checkUpdate) 属性对应的列
static Field	getField(Class<?> clazz, String name)
static Field	getField(Class<?> clazz, String name, boolean recursion)
static List<Field>	getFields(Class<?> clazz) 提取类及父类的所有属性
static List<String>	getFieldsName(Class<?> clazz)
static Object	getFieldValue(Object obj, Field field)
static Object	getFieldValue(Object obj, String field)
static Object	getFieldValue(Object obj, String field, boolean recursion)
static List<String>	getMapKeys(Map map)
static Method	getMethod(Class<?> clazz, String name, boolean recursion, Class<?>... parameterTypes)
static Method	getMethod(Class<?> clazz, String name, Class<?>... parameterTypes)
static String	getPrimaryKey(Class<?> clazz) 主键列名
static Object	getPrimaryValue(Object obj)
static Object	getValueByColumn(Object obj, String column) 根据列名读取属性值
static boolean	isJson(Object json)
static <T> List<T>	join(List<T> list, T... items)
static void	join(Map src, Map copy)
static void	join(Map src, Map copy, boolean over)
static <T> T	json2oject(String json, Class<T> clazz)
static <T> T	json2oject(String json, Class<T> clazz, com.fasterxml.jackson.annotation.JsonInclude.Include include)
static <T> T[]	list2array(List<T> list)
static String	map2json(Map<String,?> map)
static <T> T	map2object(Map<String,?> map, Class<T> clazz)
static <T> T	map2object(Map<String,?> map, Class<T> clazz, boolean recursion)
static String	map2string(Map<String,?> map)
static String	map2string(Map<String,?> map, String join, String separator, boolean ignoreEmpty, boolean sort) 按key升序拼接
static String	map2xml(Map<String,?> map)
static String	map2xml(Map<String,?> map, boolean border, boolean order)
static <T> List<T>	merge(List<T> list, T... items)
static <T> T[]	merge(T[] array, T[]... items) 数组合并
static Object	nvl(Object src, String... keys) 取第一个不为空的值
static String	object2json(Object obj)
static String	object2json(Object obj, com.fasterxml.jackson.annotation.JsonInclude.Include include)
static Map<String,Object>	object2map(Object obj)
static Map<String,Object>	object2map(Object obj, List<String> keys)
static String	object2xml(Object obj)
static <T> List<Map<String,Object>>	objects2maps(Collection<T> objs)
static <T> List<Map<String,Object>>	objects2maps(Collection<T> objs, List<String> keys)
static Map<String,Object>	param2map(String url, boolean empty) 参数转map 参数格式a=1&b=2&b=3 如果是多个值，以String的List形式保存 如果是url将根据问号分割
static String	parseFinalValue(Object obj, String key)
static String	parseFinalValue(Object obj, String key, String def)
static String[]	parseKeyValue(String src) 解析 key:vlue形式参数age:20 返回数组["age","20"] 如果值为空返回["age",""] 如果没有分隔符返回["age","age"]
static String	parseRuntimeValue(Object obj, String key)
static String	parseRuntimeValue(Object obj, String key, boolean encrypt)
static <T> List<Map<String,Object>>	pivot(Collection<T> datas, List<String> pks, List<String> classKeys, List<String> valueKeys) 行转列 表结构(编号, 姓名, 年度, 科目, 分数, 等级)
static <T> List<Map<String,Object>>	pivot(Collection<T> datas, List<String> pks, List<String> classKeys, String... valueKeys)
static <T> List<Map<String,Object>>	pivot(Collection<T> datas, String[] pks, String[] classKeys, String[] valueKeys)
static <T> List<Map<String,Object>>	pivot(Collection<T> datas, String pk, String classKey)
static <T> List<Map<String,Object>>	pivot(Collection<T> datas, String pk, String classKey, String valueKey) 行转列
static Object	propertyNvl(Map<String,?> map, String... keys) 提取第一个不为空的value
static <T> T	query(Collection<T> datas, Map<String,Object> kvs)
static <T> List<T>	querys(Collection<T> datas, int begin, int qty, Map<String,Object> kvs)
static <T> List<T>	querys(Collection<T> datas, int begin, int qty, String... params)
static <T> List<T>	querys(Collection<T> datas, int begin, String... params)
static <T> List<T>	querys(Collection<T> datas, String... params)
static void	removeProperty(Collection<Object> objs, String... keys) 过虑指定属性
static void	removeProperty(Object obj, String key)
static List<Field>	searchFieldsByAnnotation(Class clazz, Class annotation) 查询指定类的有annotation注解的属性
static Collection<?>	select(Collection<?> list, String... params) 参考 DataSet.getRows
static byte[]	serialize(Object value)
static void	setFieldsValue(Object obj, Map<String,?> map) 设置所有属性值
static boolean	setFieldValue(Object obj, Field field, Object value)
static boolean	setFieldValue(Object obj, String field, Object value)
static boolean	setFieldValue(Object obj, String field, Object value, boolean recursion)
static Map<String,String>	string2map(String str) String 转map
static Map<String,Object>	toMap(Object obj, String... keys) 对象转换成Map
static List<Map<String,Object>>	toMaps(Collection<?> objs, String... keys)
static Collection	toUpperCaseKey(Collection con, String... keys)
static Map<String,Object>	toUpperCaseKey(Map<String,Object> map, String... keys)
static Object	toUpperCaseKey(Object obj, String... keys)
static <T> T[]	union(T[] first, T[]... rest) 多个数组合并成一个数组(二维数组合成一维数组)
static Object	value(com.fasterxml.jackson.databind.JsonNode json)
static Map<String,Object>	xml2map(String xml)
static <T> T	xml2object(String xml, Class<T> clazz)
static <T> T	xml2object(String xml, Class<T> clazz, boolean recursion)

从类继承的方法 java.lang.Object

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

字段详细资料

JSON_MAPPER

public static com.fasterxml.jackson.databind.ObjectMapper JSON_MAPPER

构造器详细资料

BeanUtil

public BeanUtil()

方法详细资料

setFieldValue

public static boolean setFieldValue(Object obj,
                                    Field field,
                                    Object value)

setFieldValue

public static boolean setFieldValue(Object obj,
                                    String field,
                                    Object value,
                                    boolean recursion)

setFieldValue

public static boolean setFieldValue(Object obj,
                                    String field,
                                    Object value)

getMethod

public static Method getMethod(Class<?> clazz,
                               String name,
                               boolean recursion,
                               Class<?>... parameterTypes)

getMethod

public static Method getMethod(Class<?> clazz,
                               String name,
                               Class<?>... parameterTypes)

getField

public static Field getField(Class<?> clazz,
                             String name,
                             boolean recursion)

getField

public static Field getField(Class<?> clazz,
                             String name)

getFieldValue

public static Object getFieldValue(Object obj,
                                   Field field)

getFieldValue

public static Object getFieldValue(Object obj,
                                   String field,
                                   boolean recursion)

getFieldValue

public static Object getFieldValue(Object obj,
                                   String field)

getMapKeys

public static List<String> getMapKeys(Map map)

getColumn

public static String getColumn(Field field,
                               boolean checkInsert,
                               boolean checkUpdate)

属性对应的列

参数:

field - field

checkInsert - checkInsert

checkUpdate - checkUpdate

返回:

return

getColumn

public static String getColumn(Class<?> clazz,
                               String field,
                               boolean checkInsert,
                               boolean checkUpdate)

getAnnotationValue

public static Object getAnnotationValue(Field field,
                                        Class clazz,
                                        String property)

属性注解值

参数:

field - field

clazz - clazz

property - property

返回:

return

getValueByColumn

public static Object getValueByColumn(Object obj,
                                      String column)

根据列名读取属性值

参数:

obj - obj

column - column

返回:

return

getFields

public static List<Field> getFields(Class<?> clazz)

提取类及父类的所有属性

参数:

clazz - clazz

返回:

return

getFieldsName

public static List<String> getFieldsName(Class<?> clazz)

checkTable

public static String checkTable(Class<?> clazz)

searchFieldsByAnnotation

public static List<Field> searchFieldsByAnnotation(Class clazz,
                                                   Class annotation)

查询指定类的有annotation注解的属性

参数:

clazz - clazz

annotation - annotation

返回:

return

getPrimaryKey

public static String getPrimaryKey(Class<?> clazz)

主键列名

参数:

clazz - clazz

返回:

return

getPrimaryValue

public static Object getPrimaryValue(Object obj)

toMap

public static Map<String,Object> toMap(Object obj,
                                       String... keys)

对象转换成Map

参数:

obj - obj

keys - keys

返回:

return

toMaps

public static List<Map<String,Object>> toMaps(Collection<?> objs,
                                              String... keys)

removeProperty

public static void removeProperty(Collection<Object> objs,
                                  String... keys)

过虑指定属性

参数:

objs - objs

keys - keys

removeProperty

public static void removeProperty(Object obj,
                                  String key)

fetch

public static Collection<Object> fetch(Collection<Object> objs,
                                       String... keys)

提取指定属性值

参数:

objs - objs

keys - keys

返回:

return

fetch

public static Object fetch(Object obj,
                           String... keys)

select

public static Collection<?> select(Collection<?> list,
                                   String... params)

参考 DataSet.getRows

参数:

list - list

params - params

返回:

return

getClasses

public static List<Class> getClasses(String pack,
                                     Class... bases)

pack包下的所有类 不包括jar包中定义类

参数:

pack - pack

bases - bases

返回:

return

array2map

public static Map<String,String> array2map(String... params)

参数:

params - key1,value1,key2:value2,key3,value3 "NM:zh%","AGE:>20","NM","%zh%"

返回:

Map

map2object

public static <T> T map2object(Map<String,?> map,
                               Class<T> clazz,
                               boolean recursion)

map2object

public static <T> T map2object(Map<String,?> map,
                               Class<T> clazz)

json2oject

public static <T> T json2oject(String json,
                               Class<T> clazz,
                               com.fasterxml.jackson.annotation.JsonInclude.Include include)

json2oject

public static <T> T json2oject(String json,
                               Class<T> clazz)

map2xml

public static String map2xml(Map<String,?> map,
                             boolean border,
                             boolean order)

map2xml

public static String map2xml(Map<String,?> map)

map2json

public static String map2json(Map<String,?> map)

xml2map

public static Map<String,Object> xml2map(String xml)

map2string

public static String map2string(Map<String,?> map,
                                String join,
                                String separator,
                                boolean ignoreEmpty,
                                boolean sort)

按key升序拼接

参数:

map - 数据源

join - key,value之间的拼接符(默认=)

separator - separator 多个kv的分隔符(默认&)

ignoreEmpty - 是否忽略空值

sort - 是否排序

返回:

String(a=1&b=2&b=3)

map2string

public static String map2string(Map<String,?> map)

xml2object

public static <T> T xml2object(String xml,
                               Class<T> clazz,
                               boolean recursion)

xml2object

public static <T> T xml2object(String xml,
                               Class<T> clazz)

object2xml

public static String object2xml(Object obj)

object2map

public static Map<String,Object> object2map(Object obj)

object2map

public static Map<String,Object> object2map(Object obj,
                                            List<String> keys)

objects2maps

public static <T> List<Map<String,Object>> objects2maps(Collection<T> objs,
                                                        List<String> keys)

objects2maps

public static <T> List<Map<String,Object>> objects2maps(Collection<T> objs)

object2json

public static String object2json(Object obj,
                                 com.fasterxml.jackson.annotation.JsonInclude.Include include)

object2json

public static String object2json(Object obj)

param2map

public static Map<String,Object> param2map(String url,
                                           boolean empty)

参数转map 参数格式a=1&b=2&b=3 如果是多个值，以String的List形式保存 如果是url将根据问号分割

参数:

url - 参数或url

empty - 结果中是否包含空值,所有空值以""形式保存

返回:

Map

extract

public static List<Object> extract(Collection<?> list,
                                   String key)

提取集合中每个条目的key属性的值 如提取用户列表中的所有用户ID

参数:

list - list

key - key

返回:

return

extracts

public static List<Map<String,Object>> extracts(Collection<?> list,
                                                String... keys)

提取集合中每个条目的多个key属性的值 如提取用户列表中的所有用户ID,CODE

参数:

list - list

keys - keys

返回:

return

distinct

public static <T> Collection<T> distinct(Collection<T> list,
                                         String... keys)

去重

类型参数:

T - T

参数:

list - list

keys - 根据keys列或属性值比较

返回:

return

distinct

public static <T> Collection<T> distinct(Collection<T> list,
                                         List<String> keys)

contain

public static <T> boolean contain(Collection<T> list,
                                  T obj,
                                  String... keys)

是否包含

类型参数:

T - T

参数:

list - list

obj - obj

keys - 只比较keys列,基础类型不需要指定列

返回:

return

contain

public static <T> boolean contain(Collection<T> list,
                                  T obj,
                                  List<String> keys)

equals

public static <T> boolean equals(T obj1,
                                 T obj2,
                                 List<String> keys)

equals

public static <T> boolean equals(T obj1,
                                 T obj2,
                                 String... keys)

concat

public static String concat(List<?> list,
                            String key,
                            String split)

数组拼接成字符串

参数:

list - 数组

split - 分隔符

key - key

返回:

return

concat

public static String concat(List<?> list,
                            String split)

concat

public static String concat(List<?> list)

concat

public static <T> String concat(T[] list,
                                String key,
                                String split)

concat

public static <T> String concat(T[] list,
                                String split)

concat

public static <T> String concat(T[] list)

concat

public static String concat(int[] list,
                            String split)

concat

public static String concat(int[] list)

concat

public static String concat(long[] list,
                            String split)

concat

public static String concat(long[] list)

concat

public static String concat(double[] list,
                            String split)

concat

public static String concat(double[] list)

concat

public static String concat(float[] list,
                            String split)

concat

public static String concat(float[] list)

concat

public static String concat(short[] list,
                            String split)

concat

public static String concat(short[] list)

toUpperCaseKey

public static Object toUpperCaseKey(Object obj,
                                    String... keys)

toUpperCaseKey

public static Collection toUpperCaseKey(Collection con,
                                        String... keys)

toUpperCaseKey

public static Map<String,Object> toUpperCaseKey(Map<String,Object> map,
                                                String... keys)

list2array

public static <T> T[] list2array(List<T> list)

string2map

public static Map<String,String> string2map(String str)

String 转map

参数:

str - name:zhang,age:20

返回:

return

createMap

public static Map<String,String> createMap(String... params)

clearEmpty

public static void clearEmpty(Map<String,Object> map,
                              boolean recursion)

删除空值

参数:

map - map

recursion - 是否递归检测集合map类型值的长度

clearEmpty

public static void clearEmpty(Map<String,Object> map)

clearEmpty

public static void clearEmpty(List<Object> list,
                              boolean recursion)

删除空值

参数:

list - list

recursion - 是否递归检测集合map类型值的长度

clearEmpty

public static void clearEmpty(List<Object> list)

union

public static <T> T[] union(T[] first,
                            T[]... rest)

多个数组合并成一个数组(二维数组合成一维数组)

类型参数:

T - T

参数:

first - first

rest - rest

返回:

return

closest

public static int closest(short[] array,
                          short value)

集合中与value差值最小的成员的下标

参数:

array - array

value - value

返回:

return

closest

public static int closest(Short[] array,
                          short value)

closest

public static int closest(List<Short> array,
                          short value)

closest

public static int closest(int[] array,
                          int value)

closest

public static int closest(Integer[] array,
                          int value)

closest

public static int closest(List<Integer> array,
                          int value)

closest

public static int closest(long[] array,
                          long value)

closest

public static int closest(Long[] array,
                          long value)

closest

public static int closest(List<Long> array,
                          long value)

closest

public static int closest(float[] array,
                          float value)

closest

public static int closest(Float[] array,
                          float value)

closest

public static int closest(List<Float> array,
                          float value)

closest

public static int closest(double[] array,
                          double value)

closest

public static int closest(Double[] array,
                          double value)

closest

public static int closest(List<Double> array,
                          double value)

closest

public static int closest(BigDecimal[] array,
                          BigDecimal value)

closest

public static int closest(List<BigDecimal> array,
                          BigDecimal value)

parseFinalValue

public static String parseFinalValue(Object obj,
                                     String key)

parseFinalValue

public static String parseFinalValue(Object obj,
                                     String key,
                                     String def)

cuts

public static <T> List<T> cuts(Collection<T> list,
                               int begin,
                               int end)

集合截取

类型参数:

T - t

参数:

list - list

begin - begin

end - end

返回:

return

camel_

public static String camel_(String str)

驼峰转下划线 userName : user_name

参数:

str - src

返回:

String

camel

public static String camel(String key,
                           boolean hold)

转驼峰

参数:

key - src

hold - 是否保留分隔符

返回:

String

camel

public static String camel(String key)

Camel

public static String Camel(String key,
                           boolean hold)

Camel

public static String Camel(String key)

parseKeyValue

public static String[] parseKeyValue(String src)

解析 key:vlue形式参数age:20 返回数组["age","20"] 如果值为空返回["age",""] 如果没有分隔符返回["age","age"]

参数:

src - src

返回:

return

isJson

public static boolean isJson(Object json)

value

public static Object value(com.fasterxml.jackson.databind.JsonNode json)

extract

public static Object extract(Object src,
                             boolean voluntary,
                             String... keys)

递归提取src中的value 如 { key1:{ key11:{ key111:111 //提取111 recursion(map,key1,key11,key111) }, key12:{ key121:{ key1211:1211, key1212:1212 //提取1212 recursion(map,key1, key12, key121, key1212) } } } }

参数:

src - 数据源

voluntary - 遇到基础类型是否停止(不取下一级) voluntary=false时遇到提取基础类型属性值时返回null voluntary=true时遇到提取基础类型属性值时返回当前value并return value

keys - keys 一级key.二级key.三级key

返回:

Object

extract

public static Object extract(Object src,
                             String... keys)

nvl

public static Object nvl(Object src,
                         String... keys)

取第一个不为空的值

参数:

src - 数据源

keys - keys

返回:

Object

evl

public static Object evl(Object src,
                         String... keys)

propertyNvl

public static Object propertyNvl(Map<String,?> map,
                                 String... keys)

提取第一个不为空的value

参数:

map - map

keys - keys

返回:

String

setFieldsValue

public static void setFieldsValue(Object obj,
                                  Map<String,?> map)

设置所有属性值

参数:

obj - obj

map - map

serialize

public static byte[] serialize(Object value)

deserialize

public static Object deserialize(byte[] in)

join

public static void join(Map src,
                        Map copy)

join

public static void join(Map src,
                        Map copy,
                        boolean over)

array2list

public static <T> List<T> array2list(T[]... arrays)

descartes

public static <T> List<List<T>> descartes(List<List<T>> lists)

合成笛卡尔组合

类型参数:

T - t

参数:

lists - lists

返回:

return

merge

public static <T> T[] merge(T[] array,
                            T[]... items)

数组合并

类型参数:

T - 数据类型

参数:

array - 第一个数组

items - 其他数组

返回:

合并后数组

merge

public static <T> List<T> merge(List<T> list,
                                T... items)

join

public static <T> List<T> join(List<T> list,
                               T... items)

parseRuntimeValue

public static String parseRuntimeValue(Object obj,
                                       String key)

parseRuntimeValue

public static String parseRuntimeValue(Object obj,
                                       String key,
                                       boolean encrypt)

copy

public static Map<String,Object> copy(Map<String,Object> src,
                                      Map<String,Object> copy,
                                      List<String> keys)

copy

public static Map<String,Object> copy(Map<String,Object> src,
                                      Map<String,Object> copy,
                                      String... keys)

copy

public static Map<String,Object> copy(Map<String,Object> src,
                                      Map<String,Object> copy)

query

public static <T> T query(Collection<T> datas,
                          Map<String,Object> kvs)

querys

public static <T> List<T> querys(Collection<T> datas,
                                 int begin,
                                 String... params)

querys

public static <T> List<T> querys(Collection<T> datas,
                                 String... params)

querys

public static <T> List<T> querys(Collection<T> datas,
                                 int begin,
                                 int qty,
                                 String... params)

querys

public static <T> List<T> querys(Collection<T> datas,
                                 int begin,
                                 int qty,
                                 Map<String,Object> kvs)

pivot

public static <T> List<Map<String,Object>> pivot(Collection<T> datas,
                                                 List<String> pks,
                                                 List<String> classKeys,
                                                 List<String> valueKeys)

行转列 表结构(编号, 姓名, 年度, 科目, 分数, 等级)

类型参数:

T - 数据类型

参数:

datas - 数据集

pks - 唯一标识key(如编号,姓名)

classKeys - 分类key(如年度,科目)

valueKeys - 取值key(如分数,等级),如果不指定key则将整行作为value

返回:

如果指定key 返回结构 [ {编号:01,姓名:张三,2010-数学-分数:100}, {编号:01,姓名:张三,2010-数学-等级:A}, {编号:01,姓名:张三,2010-物理-分数:100} ] 如果只有一个valueKey则返回[ {编号:01,姓名:张三,2010-数学:100}, {编号:01,姓名:张三,2010-物理:90} ] 不指定valuekey则返回 [ {编号:01,姓名:张三,2010-数学:{分数:100,等级:A}}, {编号:01,姓名:张三,2010-物理:{分数:100,等级:A}} ]

pivot

public static <T> List<Map<String,Object>> pivot(Collection<T> datas,
                                                 String[] pks,
                                                 String[] classKeys,
                                                 String[] valueKeys)

pivot

public static <T> List<Map<String,Object>> pivot(Collection<T> datas,
                                                 String pk,
                                                 String classKey,
                                                 String valueKey)

行转列

类型参数:

T - 数据类型

参数:

datas - 数据

pk - 唯一标识key(如姓名)多个key以,分隔如(编号,姓名)

classKey - 分类key(如科目)多个key以,分隔如(科目,年度)

valueKey - 取值key(如分数)多个key以,分隔如(分数,等级)

返回:

表结构(姓名,科目,分数) 返回结构 [{姓名:张三,数学:100,物理:90,英语:80},{姓名:李四,数学:100,物理:90,英语:80}]

pivot

public static <T> List<Map<String,Object>> pivot(Collection<T> datas,
                                                 String pk,
                                                 String classKey)

pivot

public static <T> List<Map<String,Object>> pivot(Collection<T> datas,
                                                 List<String> pks,
                                                 List<String> classKeys,
                                                 String... valueKeys)