1.使用stream的方式: List<String> userIds = appPermissionVoList.stream().map(appPermissionVo->appPermissionVo.getUserId()).collect(Collectors.toList()); 2.使用guava: List<String> usrIds = Lists.transform(appPermissionVoList,appPerm->appPerm.getUserId()); 这2种写法都是支持的,stream是jdk8支...
1、List<实体>数据: publicList<Device>queryOSDevice(String cpu,String ip,String name){ String sql=null;if(cpu.equals("os_xp")){ sql="from"+this.clazz.getName()+"this WHERE this.os.id = (select id from Os o where o.name = 'com.vrv.common.system.os.WindowsXP')"; }elseif(cpu....
1.使用StringUtils工具类List转String public static void main(String[] args) { // 构造list List<String> list = Arrays.asList("张三", "李四", "王五", "赵六"); String join = StringUtils.join(list, ","); System.out.println("结果:"+join); String join1 = StringUtils.join(list); Syste...
代码 @TestvoidcontextLoads(){List<String>list=newArrayList<>();list.add("xxxx");list.add("xxxx");list.add("xxxx");list.add("xxxx");System.out.println("原来数据="+list);StringnameStr=join(",",list);System.out.println("转之后的string 数据="+nameStr);List<String>strings=stringToList...
Java // 方法一:publicStringlistToString1(Listlist,charseparator){StringBuildersb=newStringBuilder();for(inti=0;i<list.size();i++){sb.append(list.get(i)).append(separator);}returnsb.toString().substring(0,sb.toString().length()-1);}// 方法二:publicStringlistToString2(Listlist,charseparato...
列表字符串转List:将一个"对象List"还原成一个对象的List 源字符串(注意没 "key" 属性) [{ "productId": "1", "quantity": 1 }] 实际上的字符串:"[{ \"productId\": \"1\", \"quantity\": 1 }]" 实体类对象 @Data@AllArgsConstructor@NoArgsConstructor// *@Slf4jpublicclassCartDTO{/*** ...
public class List2String { public static void main(String[] args) { List<String> list = Arrays.asList("a","b","c","d","e"); //1.使用String.join() String str1 = String.join(",",list); //2.采用流的方式来写 String str2 = list2.stream().collect(Collectors.joining(","))...
Add hexidecimal character to a string Add IList to IList Add Images to DatagridView Cell Add months to GETDATE() function in sql server Add new row to datagridview one by one dynamically Add Node existing XML file Add one Column runtime to datagrid view at specific index in C# Add picture...
Add hexidecimal character to a string Add IList to IList Add Images to DatagridView Cell Add months to GETDATE() function in sql server Add new row to datagridview one by one dynamically Add Node existing XML file Add one Column runtime to datagrid view at specific index in C# Add picture...
String[] strs2 = new String[testList.size()]; for(int i=0;i<testList.size();i++){ strs2[i]=testList.get(i); } for(String s:strs2){ System.out.println(s); } 二:String数据转List 方法一: //准备一个String数组 String[] strs = {"aa","bb","cc"}; ...