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php foreach 中嵌套 switch（php嵌套for循环格式）

1

想了解phpforeach中嵌套switch的新动态吗？本文将为您提供详细的信息，我们还将为您解答关于php嵌套for循环格式的相关问题，此外，我们还将为您介绍关于${}中嵌套${}、Can''tlo

想了解php foreach 中嵌套 switch的新动态吗？本文将为您提供详细的信息，我们还将为您解答关于php嵌套for循环格式的相关问题，此外，我们还将为您介绍关于${} 中嵌套 ${}、Can''t locate Switch.pm in @INC (you may need to install the Switch module)、Django 中嵌套 Json 的序列化程序、Java 中的 switch 于 C# 中的 switch 的区别的新知识。

本文目录一览：

php foreach 中嵌套 switch（php嵌套for循环格式）

php foreach 中嵌套 switch（php嵌套for循环格式）

$arr    = array(1,2,3,4,5);
foreach ($arr as $v){
    switch ($v){
        case 1:
            echo 1;
            break;
        case 2:
            echo 2;
            break;
    }
}

break不会直接结束循环。

如果不确定，break是否会直接结束循环，执行以上代码即可验证。

${} 中嵌套 ${}

${} 中嵌套 ${}

后台中 

req.setAttribute("workAreaList",workAreaList);
req.setAttribute("tPdmisMonreportPage", tPdmisMonreport);     
-------------------------解释说明---------------------------
workAreaList是List<T> T实体类中有一个字段叫exp1，里面存了1/2/3（类似排序字段）
tPdmisMonreport也是一个List<T> T实体类中的字段是这样的 tld1。tld2、tld3、epd1、epd2、epd3等等

前台中
我要实现按照 workAreaList循环 显示出tPdmisMonreport中的字段
也就是用exp1的值“1” 替代 tld1中的“1”

---------------------------------------------------------------
<c:forEach items="${workAreaList}" var="workArea">
   <c:set var=''tld'' value="tld${workArea.exp1}" scope="page"/>
   <c:set var=''epd'' value="epd${workArea.exp1}" scope="page"/>
　　<input id="${tld}" name="${tld}" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage[tld]}''>
　　<input id="${epd}" name="${epd}" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage[epd]}''>
</c:forEach>

||
<input id="tld1" name="tld1" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.tld1}''>
<input id="tld2" name="tld2" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.tld2}''>
<input id="tld3" name="tld3" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.tld3}''>
<input id="epd1" name="epd1" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.epd1}''>
<input id="epd2" name="epd2" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.epd2}''>
<input id="epd3" name="epd3" type="text" style="width: 150px;display: none" class="inputxt"  value=''${tPdmisMonreportPage.epd3}''>

Can''t locate Switch.pm in @INC (you may need to install the Switch module)

Can''t locate Switch.pm in @INC (you may need to install the Switch module)

android 编译提示 "Can''t locate Switch.pm in @INC (you may need to install the Switch module)" 错误

Can''t locate Switch.pm in @INC (you may need to install the Switch module) (@INC contains: /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../Spreadsheet /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../ /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761 /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common/emigen_v1.pm line 1348.
BEGIN failed--compilation aborted at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common/emigen_v1.pm line 1348.
Compilation failed in require at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/emigen.pl line 104.
BEGIN failed--compilation aborted at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/emigen.pl line 104.
Can''t locate Switch.pm in @INC (you may need to install the Switch module) (@INC contains: /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../Spreadsheet /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../ /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761 /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common/emigen_v1.pm line 1348.
BEGIN failed--compilation aborted at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/../common/emigen_v1.pm line 1348.
Compilation failed in require at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/emigen.pl line 104.
BEGIN failed--compilation aborted at /home/xxx/project/vendor/mediatek/proprietary/bootable/bootloader/preloader/tools/emigen/MT6761/emigen.pl line 104.
make: *** [tools/emigen/emigen.mk:48: /home/xxx/project/out/target/product/k61v1_64_bsp_pax/obj/PRELOADER_OBJ/inc/custom_emi.h] Error 2
make: *** Waiting for unfinished jobs....
make: *** [tools/emigen/emigen.mk:52: /home/xxx/project/out/target/product/k61v1_64_bsp_pax/obj/PRELOADER_OBJ/MTK_Loader_Info.tag] Error 2
unable to load Private Key

解决办法：

sudo apt-get install libswitch-perl

Django 中嵌套 Json 的序列化程序

Django 中嵌套 Json 的序列化程序

如何解决Django 中嵌套 Json 的序列化程序

我有以下 JSON。我从 api 中获得，我想在 Django 中为这个 JSON 编写一个序列化程序，有人知道如何编写它，我只是把它写下来，但它给了我“错误无效数据或预期目录并得到一个列表”等.任何帮助将不胜感激

  1.         {
  2.    "artikelNr1":133198,"artikelNr2":0,"sku":"133198.00","statusCode":4,"statusText":"Manuell Bewirtschaftung","saisonRetourenCode":0,"saisonRetourenText":"unbestimmt","saisonCode":0,"saisonText":"SAISON","geschlechtCode":1,"geschlechtText":"UNISEX","rayonCode":0,"rayonText":"<RAYON>","warenArtCode":6600,"warenArtText":"ACCESSOIRES/DIV.","wuCode":66,"wuText":"ACCESSOIRES/DIV.","waCode":6,"warenGruppe":"DESSOUS","alterCode":20164,"farbe":"BLACK","material":"PLASTIC","bezeichnung":"''METRO BOUTIQUE GIFTCARD'' CHF20","pictureName":"art_133198_00.jpg","picturePathLocal":"p:\\\\","kollektion":"","comCode":"METRO BOUTIQUE GESCHENKKARTE CHF 20","lieferant":"...","eKchf":0,"eti":20,"vp":20,"groessenCode":0,"groessen":[
  3.       {
  4.          "artikelNr1":133198,"artikelGr":1,"groessenText":"os","sku":"133198.00.01","istZl":463,"verkPeriode":-268
  5.       }
  6.    ],"zlQty":463,"productId":82482,"published":true,"categories":[
  7.       {
  8.          "categoryRoots":[
  9.             {
  10.                "id":1,"name":"damen","parentCategoryId":0
  11.             },{
  12.                "id":188,"name":"Geschenkkarten","parentCategoryId":1
  13.             }
  14.          ],"id":188,"parentCategoryId":1
  15.       },{
  16.          "categoryRoots":[
  17.             {
  18.                "id":2,"name":"Herren",{
  19.                "id":186,"parentCategoryId":2
  20.             }
  21.          ],"id":186,"parentCategoryId":2
  22.       },{
  23.          "categoryRoots":[
  24.             {
  25.                "id":3,"name":"Mädchen",{
  26.                "id":183,"parentCategoryId":3
  27.             }
  28.          ],"id":183,"parentCategoryId":3
  29.       },{
  30.          "categoryRoots":[
  31.             {
  32.                "id":4,"name":"Jungen",{
  33.                "id":180,"parentCategoryId":4
  34.             }
  35.          ],"id":180,"parentCategoryId":4
  36.       },{
  37.          "categoryRoots":[
  38.             {
  39.                "id":1,{
  40.                "id":376,"name":"Bekleidung","parentCategoryId":1
  41.             },{
  42.                "id":21,"name":"Fanshop","parentCategoryId":376
  43.             }
  44.          ],"id":21,"parentCategoryId":376
  45.       },{
  46.                "id":411,"parentCategoryId":2
  47.             },{
  48.                "id":32,"parentCategoryId":411
  49.             }
  50.          ],"id":32,"parentCategoryId":411
  51.       }
  52.    ],"productName":"Giftcard","shortDescription":"Giftcard - Schwarz + Gelb","fullDescription":"<p>Metro Geschenkkarte - die perfekte Geschenkidee für alle Gelegenheiten<br />Dient als komfortables Zahlungsmittel in sämtlichen Metro Boutique Filialen und in unserem Online-Shop<br />Die Geschenkkarte kann in jeder Filiale aufgeladen werden<br /><spancolor:red''><spancolor:red''>Nicht retournierbar!</span></span></p>","flag":""
  53. }
  1. #---------- GrossenSerializer goes to the main object-------------#
  2. class GrossenSerializer(serializers.Serializer):
  3.     artikelNr1  = serializers.IntegerField()
  4.     artikelNr2  = serializers.IntegerField()
  5.     artikelGr   = serializers.IntegerField()
  6.     groessenText = serializers.CharField()
  7.     sku         = serializers.CharField()
  8.     istZl       = serializers.IntegerField()
  9.     verkPeriode = serializers.IntegerField()
  11. #---------- rootsCategories goes to the Categries-------------#
  12. class CategoriesRootsSerializer(serializers.Serializer):
  13.     id                  = serializers.IntegerField()
  14.     name                = serializers.CharField()
  15.     parentCategoryId    = serializers.IntegerField()
  18. #---------- CategoriesSerializer goes to the main object-------------#
  20. class CategoriesSerializer(serializers.Serializer):
  21.     id                  = serializers.IntegerField()
  22.     name                = serializers.CharField(max_length=50)
  23.     parentCategoryId    = serializers.IntegerField()
  24.     categoryRoots = CategoriesRootsSerializer(many=True,read_only=True)
  27. #---------- main json object-------------#
  28. class RecommendationjsonSerializer(serializers.Serializer):
  30.     sku = serializers.CharField(max_length=50)
  31.     artikelNr1 = serializers.IntegerField()
  32.     artikelNr2 = serializers.IntegerField()
  33.     StatusCode = serializers.IntegerField()
  34.     statusText = serializers.CharField(max_length=50)
  35.     SaisonRetourenCode = serializers.IntegerField()
  36.     saisonRetourenText = serializers.CharField(max_length=50)
  37.     saisonCode = serializers.IntegerField()
  38.     saisonText = serializers.CharField(max_length=50)
  39.     geschlechtCode = serializers.IntegerField()
  40.     geschlechtText = serializers.CharField(max_length=50)
  41.     RayonCode = serializers.IntegerField()
  42.     rayonText = serializers.CharField(max_length=50)
  43.     warenArtCode = serializers.IntegerField()
  44.     warenArtText = serializers.CharField(max_length=50)
  45.     wuCode = serializers.IntegerField()
  46.     wuText = serializers.CharField(max_length=50)
  47.     waCode = serializers.IntegerField()
  48.     warenGruppe = serializers.CharField(max_length=50)
  49.     alterCode = serializers.IntegerField()
  50.     farbe = serializers.CharField(max_length=50)
  51.     material = serializers.CharField(max_length=50)
  52.     bezeichnung = serializers.CharField(max_length=50)
  53.     pictureName = serializers.CharField(max_length=50)
  54.     picturePathLocal = serializers.CharField(max_length=50)
  55.     kollektion = serializers.CharField(max_length=50)
  56.     comCode = serializers.CharField(max_length=50)
  57.     lieferant = serializers.CharField(max_length=50)
  58.     eKchf = serializers.FloatField()
  59.     eti = serializers.FloatField()
  60.     vp = serializers.FloatField()
  61.     groessenCode = serializers.IntegerField()
  62.     groessen = GrossenSerializer(many=True,read_only=True)
  64.     zlQty = serializers.IntegerField()
  65.     productId = serializers.IntegerField()
  66.     published = serializers.BooleanField()
  68.     categories = CategoriesSerializer(many=True,read_only=True)
  70.     productName = serializers.CharField(max_length=50)
  71.     shortDescription = serializers.CharField(max_length=150)
  72.     fullDescription = serializers.CharField()
  73.     flag = serializers.CharField()

我的 serlizer 类就是这个 当我尝试针对有效运行此代码时，它会失败并给我这个错误

  1. {''non_field_errors'': [ErrorDetail(string=''Invalid data. Expected a dictionary,but got list.'',code=''invalid'')]}
  2. {''required'': ''This field is required.'',''null'': ''This field may not be null.'',''invalid'': ''Invalid data. Expected a dictionary,but got {datatype}.''}

解决方法

只需使用 Serializer fields 构建它。像这样：

  1. from rest_framework import serializers
  3. class CategoryRootSerializer(serializers.Serializer):
  4.     id = serializers.IntegerField()
  5.     name = serializers.CharField()
  6.     parentCategoryId = serializers.IntegerField()
  8. class CategorySerializer(serializers.Serializer):
  9.     id = serializers.IntegerField()
  10.     name = serializers.CharField()
  11.     parentCategoryId = serializers.IntegerField()
  12.     categoryRoots = CategoryRootSerializer(many=True,read_only=True)
  14. class GroessenSerializer(serializers.Serializer):
  15.     artikelNr1 = serializers.IntegerField()
  16.     artikelNr2 = serializers.IntegerField()
  17.     artikelGr = serializers.IntegerField()
  18.     groessenText = serializers.CharField()
  19.     sku = serializers.CharField()
  20.     istZl = serializers.IntegerField()
  21.     verkPeriode = serializers.IntegerField()
  23. class DataSerializer(serializers.Serializer):
  24.     artikelNr1 = serializers.IntegerField()
  25.     groessenCode = serializers.IntegerField()
  26.     zlQty = serializers.IntegerField()
  27.     productId = serializers.IntegerField()
  28.     published = serializers.BooleanField()
  29.     productName = serializers.CharField()
  30.     grossen = GroessenSerializer(many=True,read_only=True)
  31.     categories = CategorySerializer(many=True,read_only=True)
,

我稍微修改了你的序列化器，你可以用发布的 json 试试

  1. class GrossenSerializer(serializers.Serializer):
  2.     artikelNr1 = serializers.IntegerField()
  3.     artikelNr2 = serializers.IntegerField()
  4.     artikelGr = serializers.IntegerField()
  5.     groessenText = serializers.CharField()
  6.     sku = serializers.CharField()
  7.     istZl = serializers.IntegerField()
  8.     verkPeriode = serializers.IntegerField()
  10.     def validate(self,attrs):
  11.         return super(GrossenSerializer,self).validate(attrs)
  14. class CategoriesRootsSerializer(serializers.Serializer):
  15.     id = serializers.IntegerField()
  16.     name = serializers.CharField()
  17.     parentCategoryId = serializers.IntegerField()
  19.     def validate(self,attrs):
  20.         return super(CategoriesRootsSerializer,self).validate(attrs)
  22. class CategoriesSerializer(serializers.Serializer):
  23.     id=serializers.IntegerField()
  24.     name=serializers.CharField(max_length=50)
  25.     parentCategoryId=serializers.IntegerField()
  26.     categoryRoots=serializers.ListField(
  27.         child=CategoriesRootsSerializer(many=True,read_only=True))
  29.     def validate(self,attrs):
  30.         return super(CategoriesSerializer,self).validate(attrs)
  32. class RecommendationJsonSerializer(serializers.Serializer):
  34.     sku=serializers.CharField(max_length=50)
  35.     artikelNr1=serializers.IntegerField()
  36.     artikelNr2=serializers.IntegerField()
  37.     StatusCode=serializers.IntegerField(required=False)
  38.     statusText=serializers.CharField(max_length=50)
  39.     SaisonRetourenCode=serializers.IntegerField(required=False)
  40.     saisonRetourenText=serializers.CharField(max_length=50)
  41.     saisonCode=serializers.IntegerField()
  42.     saisonText=serializers.CharField(max_length=50)
  43.     geschlechtCode=serializers.IntegerField()
  44.     geschlechtText=serializers.CharField(max_length=50)
  45.     RayonCode=serializers.IntegerField(required=False)
  46.     rayonText=serializers.CharField(max_length=50)
  47.     warenArtCode=serializers.IntegerField()
  48.     warenArtText=serializers.CharField(max_length=50)
  49.     wuCode=serializers.IntegerField()
  50.     wuText=serializers.CharField(max_length=50)
  51.     waCode=serializers.IntegerField()
  52.     warenGruppe=serializers.CharField(max_length=50)
  53.     alterCode=serializers.IntegerField()
  54.     farbe=serializers.CharField(max_length=50)
  55.     material=serializers.CharField(max_length=50)
  56.     bezeichnung=serializers.CharField(max_length=50)
  57.     pictureName=serializers.CharField(max_length=50)
  58.     picturePathLocal=serializers.CharField(max_length=50)
  59.     kollektion=serializers.CharField(max_length=50,allow_blank=True)
  60.     comCode=serializers.CharField(max_length=50)
  61.     lieferant=serializers.CharField(max_length=50)
  62.     eKchf=serializers.FloatField()
  63.     eti=serializers.FloatField()
  64.     vp=serializers.FloatField()
  65.     groessenCode=serializers.IntegerField()
  66.     groessen=GrossenSerializer(many=True,read_only=True)
  68.     zlQty=serializers.IntegerField()
  69.     productId=serializers.IntegerField()
  70.     published=serializers.BooleanField()
  72.     categories=CategoriesSerializer(many=True,read_only=True)
  74.     productName=serializers.CharField(max_length=50)
  75.     shortDescription=serializers.CharField(max_length=150)
  76.     fullDescription=serializers.CharField()
  77.     flag=serializers.CharField(allow_blank=True)
  79.     def validate(self,attrs):
  80.         return super(RecommendationJsonSerializer,self).validate(attrs)

Java 中的 switch 于 C# 中的 switch 的区别

Java 中的 switch 于 C# 中的 switch 的区别

一、java 当中的 switch 与 C# 相比有以下区别

　注：在 java 中 switch 后的表达式的类型只能为以下几种：byte、short、char、int（在 Java1.6 中是这样），
   在 java1.7 后支持了对 string 的判断
   
   还有一点要注意的是：在 java 中如果 switch 的 case 语句中少写了 break; 这个关键字，在编译的时候并没有报错
   　　　　　　　　　　但是在执行的时候会一直执行所有 case 条件下的语句并不是去判断，所以会一直执行直到遇到 break 关键字跳出或者一直执行到 defaut 语句。
   　　　　　　　　　　还有就是如果在 switch 表达的结果在 case 中没话 swithc 就会从 default 执行，这是与 C# 不同的地方。

public class TestSwitch{
    public static void main(String args[]){
        char c = ''a'';        //char类型字符
        switch(c){
            default:
                System.out.println("打印默认值");
                break;
            case ''a'':
                System.out.println("a");
                break;
            case ''b'':
                System.out.println(''b'');
                break;
            case ''c'':
                System.out.println(''c'');
                break;
            case ''d'':
                System.out.println("d");
                break;
            
        }
    }
}

 

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