I need to deserialize a Json file that has an array. I know how to deserialize it so that I get a List object, but in the framework I am using a custom list object that does not implement the Java List interface. My question is, how do I write a deserializer for my custom list object? EDIT: I want the deserializer to be universal, meaning that I want it ot work for every kind of list, like Cu
我需要反序列化一个有数组的Json文件。 我知道如何反序列化它,以便获得一个List对象,但在框架中,我使用了一个不实现Java List接口的自定义列表对象。 我的问题是,如何为我的自定义列表对象编写反序列化器? 编辑:我想反序列化是普遍的,这意味着我希望它不适用于每种类型的列表,如CustomList<Integer> , CustomList<String> , CustomList<CustomModel>不仅仅是一种特定类型的列表,因为它会很烦人
When should I use a ThreadLocal variable? How is it used? One possible (and common) use is when you have some object that is not thread-safe, but you want to avoid synchronizing access to that object (I'm looking at you, SimpleDateFormat). Instead, give each thread its own instance of the object. For example: public class Foo { // SimpleDateFormat is not thread-safe, so give one t
什么时候应该使用ThreadLocal变量? 它是如何使用的? 一种可能的(也是常见的)用法是当你有一些不是线程安全的对象时,但你想避免同步对象的访问(我在看你,SimpleDateFormat)。 相反,给每个线程自己的对象的实例。 例如: public class Foo { // SimpleDateFormat is not thread-safe, so give one to each thread private static final ThreadLocal<SimpleDateFormat> formatter = new ThreadLocal&
I have an int array int[] myArray = new int[100]; and want to get indexes of smallest 10 (any n) elements. How can I do this? make an object that contains the number and the index, then make an array of these objects, then perform Array.Sort(arrayset[], comparator) java docs. Then you can just pick out the top x items from the sorted array. EDIT: Something like this... [I had used this to
我有一个int数组int[] myArray = new int[100]; 并希望得到最小10个(任意n个)元素的索引。 我怎样才能做到这一点? 创建一个包含数字和索引的对象,然后创建这些对象的数组,然后执行Array.Sort(arrayset [],comparator)java docs。 然后,您可以从排序后的数组中挑选出前x个项目。 编辑:像这样的东西... [我用这个按照'距离' import java.util.Arrays; import java.util.Comparator; public class Neares
I have a class named Person with multiple properties, for example: public class Person { private int id; private String name, address; // Many more properties. } A lot of Person -objects are stored in an ArrayList<Person> . I want to sort this list by multiple sort parameters, and different from time to time. For instance I might one time want to sort by name ascending and t
我有一个名为Person的类,有多个属性,例如: public class Person { private int id; private String name, address; // Many more properties. } 很多Person对象存储在ArrayList<Person> 。 我想通过多个排序参数对这个列表进行排序,而且时间不同。 比如我可能有一次想在排序name递增,然后address降下来,只是另一次id下降。 我不想创建自己的排序方法(即,我想使用Collections.sort(personList, s
I am looking to implement a sort feature for my address book application. I want to sort an ArrayList<Contact> contactArray . Contact is a class which contains four fields: name, home number, mobile number and address. I want to sort on name . How can I write a custom sort function to do this? Here's a tutorial about ordering objects: The Java Tutorials - Collections - Object
我正在寻找为我的地址簿应用程序实施排序功能。 我想排序一个ArrayList<Contact> contactArray 。 Contact是一个包含四个字段的类别:姓名,家庭号码,手机号码和地址。 我想按name排序。 我如何编写自定义排序功能来执行此操作? 以下是关于订购对象的教程: Java教程 - 集合 - 对象排序 尽管我会举一些例子,但我仍建议您阅读它。 有多种方法可以对ArrayList进行排序。 如果你想定义一个自然的 (默认)
we are trying to convert our existing app to spring boot app. custom entity manager is used to connect to database in app. Whenever we are running app ,server is stopping with following logs. logs are not giving me clue for any issues Pom.xml ` http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchem
我们正试图将我们现有的应用程序转换为Spring启动应用程序。 自定义实体管理器用于连接到应用程序中的数据库。 无论何时我们运行应用程序,服务器都会停止并显示以下日志。 日志没有给我任何问题的线索 Pom.xml`http://maven.apache.org/xsd/maven-4.0.0.xsd“xmlns =”http://maven.apache.org/POM/4.0.0“xmlns:xsi =”http: //www.w3.org/2001/XMLSchema-instance“> 4.0.0 <parent> <groupId>org.sprin
I am facing issue in setting java compiler version for the parent-child pom files. I added maven-compiler-plugin in child pom with version 1.7 and noticed that the java version changed from default 1.5 to 1.7 for child module and the parent project is still with 1.5. Then, I moved the compiler plugin from child pom to parent pom. Expected that the compiler version will be changed to 1.7 for bo
我在为父子pom文件设置java编译器版本时遇到了问题。 我在版本1.7的子pom中添加了maven-compiler-plugin,并注意到java版本从默认的1.5更改为1.7,而父项目仍然是1.5。 然后,我将编译器插件从子POM移到父POM。 预计父代和子代maven模块的编译器版本将更改为1.7。 但奇怪的是没有观察到变化,子模块仍然是1.7,父项目是1.5。 我从eclipse IDE执行'maven-> update project'。 但没用。 供参考:建设亲子项目工
I have an application (Spring 4 MVC+Hibernate 4+MySQL+Maven integration example using annotations) , integrating Spring with Hibernate using annotation based configuration. I just added a couple of repositories OSGEO GeoTools repo & Hibernate Spatial repo in order to have access to org.hibernate.spatial.GeometryType type. I clean and install the maven project but the jar is not installed.
我有一个应用程序(使用注释的Spring 4 MVC + Hibernate 4 + MySQL + Maven集成示例),使用基于注释的配置将Spring与Hibernate集成。 我刚刚添加了一些OSGEO GeoTools仓库和Hibernate Spatial仓库,以便访问org.hibernate.spatial.GeometryType类型。 我清理并安装maven项目,但jar没有安装。 hibernate-spatial 5.0.5不兼容我使用4.3.2的hibernate版本。 maven central提供的版本是从版本开始的版本 http://maven.apac
How i can i pack switchyard application with has dependencies to my another project with maven? Currently i'm trying to make things work as explained here official dock But with no result, on startup of application in log file i see Caused by: java.lang.NoClassDefFoundError: com/aspiderngi/common/switchyard/InventoryRequest Caused by: java.lang.ClassNotFoundException: com.aspiderngi.commo
我可以如何将switchyard应用程序与依赖关系包装到我的另一个项目中,并使用maven? 目前我正在努力让事情按照这里所说的官方码头工作 但没有结果,在我看到的日志文件启动应用程序 Caused by: java.lang.NoClassDefFoundError: com/aspiderngi/common/switchyard/InventoryRequest Caused by: java.lang.ClassNotFoundException: com.aspiderngi.common.switchyard.InventoryRequest from... 反正可以实现吗? 更新:pom.
I'm trying to run exec-maven-plugin 's exec:java goal on a simple two-module project where one module depends on the other. So far I can't find a configuration that works. Here's a boiled-down test case: exec-multi-module-test/ pom.xml module1/ pom.xml src/ main/ java/ HelloPrinter.java module2/ pom.xml src/ main/ java/ MyMain.java Here's the pa
我试图在一个简单的双模块项目上运行exec-maven-plugin的exec:java目标,其中一个模块依赖于另一个模块。 到目前为止,我找不到可用的配置。 这是一个简化的测试用例: EXEC-多模块检验/ 的pom.xml 模块1 / 的pom.xml SRC / 主要/ 的Java / HelloPrinter.java 模块2 / 的pom.xml SRC / 主要/ 的Java / MyMain.java 这是父pom: <?xml version="1.0" encoding="UTF-8"?> <project xmlns