The MaduraDateTime framework is a Java library used to handle the date and time.The technical principle of the framework is achieved by abstracting the date and time as a series of combined objects.It uses a style similar to functional programming, making it more flexible and easy to understand when the processing date and time. In the Java class library, the MaduradateTime framework can be applied to many scenarios.Below we will discuss its application in the following aspects. 1. Date and time calculation: The MaduradateTime framework provides a set of rich APIs that can be used to perform computing operations of various dates and time.For example, you can easily calculate the differences between the two dates, add or subtract a certain amount of time, and perform a comparative operation of various dates and time.The following is an example code that calculates the difference between the two dates: ```java import nz.net.ultraq.thymeleaf.expression.Dates; public class Main { public static void main(String[] args) { MaduraDateTime fromDate = MaduraDateTime.now().minusDays(7); MaduraDateTime toDate = MaduraDateTime.now(); MaduraDuration duration = toDate.between(fromDate); System.out.println("Difference in days: " + duration.getDays()); } } ``` 2. Date and time formatting: MaduradateTime framework provides flexible date and time formatting options.You can define the custom format mode according to your needs to formatting and analyzing the date and time.The following is an example code that forms the date format into a specified mode: ```java import nz.net.ultraq.thymeleaf.expression.Dates; public class Main { public static void main(String[] args) { MaduraDateTime dateTime = MaduraDateTime.now(); String formattedDate = dateTime.format("yyyy-MM-dd HH:mm:ss"); System.out.println("Formatted date: " + formattedDate); } } ``` 3. Time zone conversion: MaduradateTime framework provides support for the time zone, so that you can easily change between different time zones.You can create another time zone object from the date and time object of one time zone and perform various operations.The following is an example code that converts the date and time from one time zone to another: ```java import nz.net.ultraq.thymeleaf.expression.Dates; public class Main { public static void main(String[] args) { MaduraDateTime dateTime = MaduraDateTime.now(); System.out.println("Original date and time: " + dateTime); MaduraDateTime convertedDateTime = dateTime.atZone(ZoneId.systemDefault()) .withZoneSameInstant(ZoneId.of("UTC")); System.out.println("Converted date and time: " + convertedDateTime); } } ``` In short, the technical principles of MaduradateTime framework are widely used in the Java library.It can not only help developers to handle the date and time more conveniently, but also improve the readability and maintenance of the code.Whether it is the calculation of the date and time, the formatting or the time zone conversion, the framework is a very useful tool.

MaduradateTime is a Java class library for processing date and time.It is based on the Java.time library provided by Joda-Time library and Java 8, and provides more convenient and flexible date-time operation methods. MaduradateTime's technical principles mainly include the following aspects: 1. Internal data structure: MaduradateTime uses an enumeration class called "Chronounit" to indicate different units of the date and time, such as year, month, day, hour, minute, etc.It also uses an interface called "Datetimefield" to represent the date time field, such as year, month, number of days, etc.These data structures can be used to calculate the differences between the date and time and the implementation of addition and subtraction operations. 2. Timeline: MaduradateTime uses a class called "TimeScale" to represent the timeline, which defines the relationship between the date and time.The timeline is calculated based on different calendar (such as Giri calendar, Confucian calendar, etc.), and can be switched as needed. 3. Time zone processing: MaduradateTime provides rich time zone processing functions, which can handle conversion and calculations between different time zones.It uses Java 8's java.time.zone package to obtain time zone information and uses the time zone offset for related calculations. 4. Date time calculation: MaduradateTime provides a series of convenient date and time calculation methods.For example, you can use the DateTimeField interface to implement the addition and subtraction of the date field. You can use the Chronounit enumeration class to achieve the addition and subtraction operation of the date time unit.It can also perform operations, formatting, analysis and other operations of date and time. The following is a simple MaduradateTime example code: ```java import nz.net.ultraq.thymeleaf.expression.MaduraDateTime; public class MaduraDateTimeExample { public static void main(String[] args) { MaduraDateTime maduraDateTime = new MaduraDateTime(); // Get the current date time System.out.println ("Current Date Time:" + Maduradatetime.now ()); // Get the current date System.out.println ("current date:" + Maduradatetime.today ()); // Get the current time System.out.println ("current time:" + Maduradatetime.nowtime ()); // Add subtraction days System.out.println ("Plus 10 days later:" + Maduradatetime.adddDDDAys (10)); // Calculate the gap between the number of days between the two dates System.out.println ("The number of days between two dates:" + Maduradatetime.diffdays ("2022-01-01", "2022-02-01"););););););););) // Formatting date time System.out.println ("Formatting Date:" + Maduradatetime.Format ("2022-01-01", "Yyyy Year MM Month DD Day")););); // Analyze the date string as MaduradateTime object String dateStr = "2022-01-01"; MaduraDateTime parsedDateTime = maduraDateTime.parse(dateStr); System.out.println ("The date object after analysis:" + ParsedDatetime); } } ``` The above code shows some of the basic usage of the MaduraDateTime class library, including the operations such as obtaining the current date time, date time, date calculation, formatting, and analysis.By using MaduradateTime, we can easily handle the operating needs of the date and time.

Attoparser is a Java class library for analysis and processing HTML/XML documents.It is based on Apache Xercess and Antlr technology, and aims to provide a reliable and efficient parster to process HTML and XML files in Web development. The working principle of Attoparser is as follows: 1. Read document: Use Attoparser, we first need to obtain HTML/XML documents from files, string or networks.You can use Java input stream reading files, or use the HTTP client to obtain documents from the web server. ``` File inputFile = new File("document.html"); Document doc = Jsoup.parse(inputFile, "UTF-8", "http://example.com/"); ``` 2. Analysis document: Once we get the document, we can use Attoparser to start parsing.ATTOPARSER uses an event -based analysis model. It reads the label, attributes and text nodes in the document one by one, and generates corresponding events.We can register for appropriate processing procedures to handle these events. ``` ParserDelegator parser = new ParserDelegator(); parser.parse(new StringReader(html), handler, true); ``` 3. Processing event: In the analysis process, Attoparser will generate the following types of events: start labels, end labels, text, annotations, etc.We can realize the custom processor as needed to handle these events. ``` class MyHandler extends DefaultHandler { public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { // Treat the start label event } public void endElement(String uri, String localName, String qName) throws SAXException { // Treatment the end label event } public void characters(char ch[], int start, int length) throws SAXException { // Treatment text events } } ``` 4. Extract data: When processing the event, you can extract information from the HTML/XML document as needed.For example, we can extract the attribute values of specific tags, text content, etc. ``` public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if (qName.equalsIgnoreCase("a")) { String href = attributes.getValue("href"); // Extract the href attribute value in the <a> label } } ``` 5. Complete analysis: Once the document is fully analyzed, we can perform some cleaning or processing work and close relevant resources. ``` parser.finish(); ``` Summarize: Attoparser is a powerful and easy -to -use Java class library for analysis and processing HTML/XML documents.It provides a reliable and efficient method to handle the HTML and XML files in Web development by reading the nodes in the document and generating the corresponding events one by one.Developers can use custom event processing procedures to extract data or perform other operations as needed to make it an ideal choice for handling Web documents.

Use the Lodash framework to perform function combinations and Curihua Lodash is a JS practical tool library that provides a set of convenient functions to simplify the writing of the JavaScript program.In the Lodash framework, function combinations and Corry are two important concepts and technologies, which can help us better manage and reuse code. Function combination refers to connecting multiple functions together to form a new function. The new function will execute these functions in the order of the combination.This method can connect multiple logic operations to improve the readability and maintenance of the code.Lodash provides a function combination of the function to implement the function combination. Below is a Java code example using Lodash for a function combination: ```java import java.util.function.Function; import static com.google.common.base.Preconditions.checkArgument; import static java.util.Objects.requireNonNull; public class FunctionCompositionExample { public static void main(String[] args) { Function<Integer, Integer> addOne = x -> x + 1; Function<Integer, Integer> multiplyByTwo = x -> x * 2; Function<Integer, Integer> composedFunction = FunctionComposition.compose(addOne, multiplyByTwo); System.out.println(composedFunction.apply(3)); // Output: 7 // Equivalent implementation without using Lodash Function<Integer, Integer> manualComposedFunction = x -> multiplyByTwo.apply(addOne.apply(x)); System.out.println(manualComposedFunction.apply(3)); // Output: 7 } static class FunctionComposition { static <T> Function<T, T> compose(Function<T, T>... functions) { checkArgument(functions.length > 0, "At least one function should be provided"); Function<T, T> composedFunction = requireNonNull(functions[0]); for (int i = 1; i < functions.length; i++) { composedFunction = composedFunction.andThen(requireNonNull(functions[i])); } return composedFunction; } } } ``` Corride is a function conversion technology that converts a multi -parameter function into a series of functions that only accept a single parameter.This conversion makes the function more flexible and can generate new functions through some applications.Lodash provides the `_.curry` function to achieve Curry. The following is an example of Java code that uses lodash for Corrihua: ```java import java.util.function.Function; import static com.google.common.base.Preconditions.checkArgument; import static java.util.Objects.requireNonNull; public class FunctionCurryingExample { public static void main(String[] args) { Function<Integer, Function<Integer, Integer>> add = a -> b -> a + b; Function<Integer, Integer> addFive = add.apply(5); System.out.println(addFive.apply(3)); // Output: 8 // Equivalent implementation without using Lodash Function<Integer, Function<Integer, Integer>> manualAdd = a -> { return b -> { return a + b; }; }; Function<Integer, Integer> manualAddFive = manualAdd.apply(5); System.out.println(manualAddFive.apply(3)); // Output: 8 } } ``` Through the Lodash function combination and Curry, we can more conveniently organize and reuse code to improve the readability and maintenance of the program.Whether it is a function combination or Corride, it is a powerful tool provided by the Lodash framework to help developers write and manage the JavaScript program more efficiently.

Swift Annotations is a framework in the Java class library that is used to add annotations to the code.This article will analyze the technical principles of Swift Annotations and explain the Java code example. 1. What is Swift Annotations? The annotation is a metadata in Java, which can be added to the class, methods, parameters and other locations in the code to provide additional information and guidance compilers, parsing tools and operating behaviors.The Swift Annitations framework provides a simple way to use the annotation for Java developers. 2. Note declaration and use First of all, we need to define an annotation.The annotation uses the@interface keyword of Java to define. The member variables of the annotation can be declared by the method of method.For example, we define an annotation called @AUUROR and the author's information for marking code: ``` public @interface Author { String name(); String date(); } ``` We can then use the annotation in the code.For example, we can mark the author's information on a class: ``` @Author(name = "John Smith", date = "2022-01-01") public class MyClass { // Class content } ``` 3. Analysis annotation The Swift Annitations framework provides some tool categories and APIs to help us analyze the annotation. First, we need to obtain the annotated element, such as a class or method.You can use the Java reflection mechanism to achieve it. For example, obtain the annotation information of a class through the following code: ``` Class<MyClass> clazz = MyClass.class; Author authorAnnotation = clazz.getAnnotation(Author.class); ``` Next, we can use the method of the Annotion object to obtain the value of the membership of the annotation, for example, to obtain the author's name and date: ``` String authorName = authorAnnotation.name(); String date = authorAnnotation.date(); ``` 4. Application scenario The application scenarios of Swift Annotations are very wide.Here are some common application examples: -Plodes: You can use annotations to generate some repeated code.For example, in a web application, we can use @route annotations to mark the routing information of the request processing program, and then use the Swift Annotations framework to automatically generate the routing mapping table. -The configuration management: You can use the annotation to mark the configuration information, and analyze and manage these configurations through the Swift Annotations framework.For example, we can use the @Config annotation on a configuration class to mark the various configurations of the application, and then load and analyze the configuration file through the SWIFT Annitations framework. -Log tracking: You can use the method or class that requires the logging of the log record, and then use the Swift Annotations framework to implement the log tracking function. Through the above example, we have a certain understanding of the technical principles of Swift Annotions.By defining and parsing annotations, we can add additional meta -data to the Java code to achieve customization of various functions and behaviors.The Swift Annitations framework provides a simple and flexible way to use the annotation for Java developers to improve the readability and maintenance of the code. I hope this article will help you understand the technical principles of Swift Annotations!

The HTTP Client framework is a tool commonly used in the Java class library for HTTP communication with the server.It provides a simple and easy -to -use API that allows developers to easily send HTTP requests and deal with response.Below we will introduce the application example of the HTTP Client framework and provide some Java code examples. The HTTP Client framework can be used in various application scenarios, such as obtaining web content, calling RESTFUL API, uploading files, etc.Here are several common application examples: 1. Send GET request to get web content: ```java import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; public class HttpClientExample { public static void main(String[] args) throws Exception { HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://example.com")) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } } ``` The above code uses http client to send a get request to "https://example.com" and print the response content. 2. Send post request call Restful API: ```java import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; import java.net.http.HttpHeaders; import java.util.HashMap; import java.util.Map; public class HttpClientExample { public static void main(String[] args) throws Exception { HttpClient client = HttpClient.newHttpClient(); Map<String, String> requestBody = new HashMap<>(); requestBody.put("name", "John"); requestBody.put("age", "30"); String requestBodyJson = toJson(requestBody); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://api.example.com/user")) .header("Content-Type", "application/json") .POST(HttpRequest.BodyPublishers.ofString(requestBodyJson)) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } private static String toJson(Map<String, String> map) { // Convert the map to a JSON string } } ``` The above code uses http client to send a post request to "https://api.example.com/user" and pass a JSON format request body. 3. Upload file to the server: ```java import java.net.URI; import java.nio.file.Files; import java.nio.file.Path; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; public class HttpClientExample { public static void main(String[] args) throws Exception { HttpClient client = HttpClient.newHttpClient(); Path filePath = Path.of("/path/to/file.txt"); byte[] fileData = Files.readAllBytes(filePath); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://api.example.com/upload")) .POST(HttpRequest.BodyPublishers.ofByteArray(fileData)) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } } ``` The above code uses http client to send a post request to "https://api.example.com/upload" and upload a file in the form of byte array. These examples demonstrate the application of the HTTP Client framework in the Java class library. It can simplify the implementation of HTTP communication and provide a more convenient and flexible way to interact with the server.Regardless of whether to obtain a simple webpage content or call the RESTFUL API or upload files, HTTP Client is a powerful tool.

Use the Commons Digester framework to process data analysis in the Java class library Summary: In the Java library, data analysis of various formats often needs to be processed.Commons Digest is a powerful framework that can easily process analysis of data formats such as XML and CSV.This article will introduce how to use the Commons Digester to implement data analysis and provide relevant Java code examples. 1 Introduction Commons Digester is an event -based Java XML parser.It analyzes the XML document as a Java object by configuration rules, thereby simplifying the process of data analysis.In addition to XML parsing, Commons Digerster can also process other format data, such as CSV, JSON, etc. 2. Installation and configuration First of all, we need to add Commons Digerster to the project.It can be achieved by adding the following dependencies to the POM.XML file: ``` <dependency> <groupId>commons-digester</groupId> <artifactId>commons-digester</artifactId> <version>3.3</version> </dependency> ``` After the installation is completed, we can start configured the rules of the DIGESTER. 3. Configuration rules The configuration rules of the DIGESTER include the pattern matching and the definition of the rules.The pattern matching is used to specify the node path to be parsed, the rules define it to specify how to parse the node and how to map the analytic results to the Java object. Below is a sample xml file: ```xml <employees> <employee> <name>John</name> <age>25</age> </employee> <employee> <name>Jane</name> <age>30</age> </employee> </employees> ``` Below is a regular configuration example of the rules of the XML file using DIGESTER: ```java // Create a DIGESTER object Digester digester = new Digester(); // Set the rules DIGESTER.ADDOBJECTCREATE ("Employeees/Employee", Employee.class); // Create an Employee object object DIGESTER.ADDBEANPROPROPRTYSETER ("Employees/Employee/name", "name"); // Set the name property DIGESTER.ADDDBEANPROPROPRTYSETER ("Employees/Employee/Age", "Age"); // Set the Age property DIGESTER.ADDSETNEXT ("Employees/Employee", "AddemPloyee"); // Add the analysis results to // Call the PARSE method for analysis List<Employee> employees = digester.parse(xmlFile); ``` Through the above configuration, Digester will create an Employee object based on the rules and set the name and Age property to the corresponding value.Finally, add the analysis results to a list. 4. Other functions In addition to basic XML analysis, Commons Digest also provides other powerful functions, such as custom rules, error treatment, naming space processing, etc.Developers can use these functions according to specific needs. in conclusion: By using the COMMONS DIGESTER framework, we can easily process data analysis in various formats in the Java library.This article introduces the basic usage of Commons Digester and gives relevant Java code examples.It is hoped that this article will help readers when processing data analysis. Reference materials: -COMMONS DIGESTER official document: [https://commons.apache.org/digerster/] (https://commons.apache.org/digester/)) -POMMONS DIGESTER GITHUB Warehouse: [https://github.com/apache/commons-digerster] (https://github.com/apache/commons-digerster)

Lodash is a popular JavaScript tool library that provides many practical functions that can simplify the development process and improve the readability and maintenance of code.This article will introduce some common functions in the Lodash framework and provide the corresponding Java code example. 1. Array function: -__.chunk (Array, SIZE): The array is split into multiple new array according to the specified size. ```java List<Integer> array = Arrays.asList(1, 2, 3, 4, 5, 6); List<List<Integer>> chunks = _.chunk(array, 3); // chunks: [[1, 2, 3], [4, 5, 6]] ``` -__.filter (Array, Predicate): Filter the elements in the array according to the specified condition, and return a new array that meets conditions. ```java List<Integer> array = Arrays.asList(1, 2, 3, 4, 5, 6); List<Integer> filtered = _.filter(array, n -> n % 2 == 0); // filtered: [2, 4, 6] ``` -_ _.Map (Array, Iteratee): Execute the specified function of each element in the array and return the new array after processing. ```java List<Integer> array = Arrays.asList(1, 2, 3, 4, 5, 6); List<Integer> mapped = _.map(array, n -> n * 2); // mapped: [2, 4, 6, 8, 10, 12] ``` 2. Object function: -__.clone (obj): a clone object, returns the same copy as the original object. ```java Map<String, Integer> obj = new HashMap<>(); obj.put("a", 1); Map<String, Integer> clonedObj = _.clone(obj); ``` -_ _.keys (obj): Returns the array of all attribute names of the given object. ```java Map<String, Integer> obj = new HashMap<>(); obj.put("a", 1); obj.put("b", 2); List<String> keys = _.keys(obj); // keys: ["a", "b"] ``` -_ _.Values (obj): Returns the array of all attribute values of the given object. ```java Map<String, Integer> obj = new HashMap<>(); obj.put("a", 1); obj.put("b", 2); List<Integer> values = _.values(obj); // values: [1, 2] ``` 3. String function: -_ _.startswith (str, target): Determine whether the strings start with the specified target string. ```java String str = "Hello World"; boolean startsWith = _.startsWith(str, "Hello"); // startsWith: true ``` -_ _.endswith (str, target): Determine whether the strings end to end with a specified target string. ```java String str = "Hello World"; boolean endsWith = _.endsWith(str, "World"); // endsWith: true ``` -__.trim (STR): Remove the space at both ends of the string. ```java String str = " Hello World "; String trimmed = _.trim(str); // trimmed: "Hello World" ``` The above is simply a brief introduction to some common functions in the Lodash framework, and there are other rich functions for developers.Mastering Lodash can greatly improve the efficiency and quality of JavaScript development.

Attoparser is a Java class library for analysis of HTML and XML documents.It provides a simple and effective way to extract and operate data in these documents.Here are examples and practice of using the Attoparser framework. 1. Introduce the Attoparser Library First, you need to add the Attoparser library to the Java project.The following dependencies can be added to the construction tools such as Maven or Gradle: ```xml <dependency> <groupId>org.attoparser</groupId> <artifactId>attoparser</artifactId> <version>2.0.4.RELEASE</version> </dependency> ``` 2. Analyze the HTML document The following is a simple example. Demonstration of how to use Attoparser to resolve HTML documents and extract the title and paragraph content: ```java import org.attoparser.simple.*; public class HtmlParserExample { public static void main(String[] args) throws Exception { String html = "<html><body><h1>Title</h1><p>Paragraph 1</p><p>Paragraph 2</p></body></html>"; IHtmlParser htmlParser = new AttoParserBuilderFactory().getHTMLParser(); HtmlHandler htmlHandler = new HtmlHandler(); htmlParser.parse(html, htmlHandler); System.out.println("Title: " + htmlHandler.getTitle()); System.out.println("Paragraphs: " + htmlHandler.getParagraphs()); } private static class HtmlHandler extends AbstractSimpleMarkupHandler { private StringBuilder currentElementContent = new StringBuilder(); private StringBuilder title = new StringBuilder(); private List<String> paragraphs = new ArrayList<>(); public void handleOpenElement(final String elementName, final List<String> attrs) { // Turn the open label of the element currentElementContent = new StringBuilder(); } public void handleText(final char[] text, final int textLen) { // Treatment element content text currentElementContent.append(text, 0, textLen); } public void handleCloseElement(final String elementName) { // Treat the closure label of the element if (elementName.equals("h1")) { title.append(currentElementContent); } else if (elementName.equals("p")) { paragraphs.add(currentElementContent.toString()); } } public String getTitle() { return title.toString(); } public List<String> getParagraphs() { return paragraphs; } } } ``` In the above example, we created a HTMLHANDLER class that inherited from ABSTRACTSIMPLEMARKUPHANDLER and rewritten the method of this class to handle HTML marks.In the handleopeenelement method, we initialized the StringBuilder object for preserving the content of the current element.In the handletext method, we add the text of the element content to the StringBuilder object of the current element content.In the HandleCloseElement method, we decide whether the content is the title or paragraph according to the name of the element, and save it into the corresponding variable.Finally, in the Main method, we created instances of the HTMLPARSEREXAMPLE class, using Attoparser to analyze the HTML document, and obtained the extracted title and paragraph content from the HTMLHANDLER class and printed them. Through the above examples, how to use the ATTOPARSER framework to parse the HTML document and extract the data.The HTMLHANDLER class can be extended as needed to extract more content or perform other operations.

The integrated guide of the HTTP Client framework and the proxy server in the Java class library Introduction: When using Java for network programming, integration with the agency server is often an important demand.The proxy server acts as a middleman between the client and the Internet server, which is used to forward the network request and response.This guide will guide you to integrate steps with the agency server through the HTTP Client framework in the Java class library, and provide Java code example to help you better understand. Step 1: Create an HTTP Client instance Using the HTTP Client framework in the Java Library, we first need to create an HTTP Client instance.The following is an example code: ``` import java.net.http.HttpClient; public class Main { public static void main(String[] args) { HttpClient httpClient = HttpClient.newHttpClient(); // Create a default http client example here // You can also make a custom configuration as needed } } ``` Step 2: Configure the proxy server The next step is to configure the HTTP Client instance to use the proxy server.You can complete this operation by specifying the host and port number of the proxy server.The following is an example code: ``` import java.net.Proxy; import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; public class Main { public static void main(String[] args) { // Configure the proxy server Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("proxy.example.com", 8080)); // Create an HTTP Client instance and configure the proxy server HttpClient httpClient = HttpClient.newBuilder() .proxy(proxy) .build(); // Create HTTP request HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://www.example.com")) .build(); // Send HTTP request try { HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } catch (Exception e) { e.printStackTrace(); } } } ``` Step 3: Authentication proxy server (if necessary) If the proxy server requires authentication, it needs to provide the user name and password of the proxy server when configuring the HTTP Client instance.The following is an example code: ``` import java.net.Authenticator; import java.net.InetSocketAddress; import java.net.PasswordAuthentication; import java.net.Proxy; import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; public class Main { public static void main(String[] args) { // Configure the proxy server Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("proxy.example.com", 8080)); // Configure the identity verification of the proxy server Authenticator authenticator = new Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("username", "password".toCharArray()); } }; Authenticator.setDefault(authenticator); // Create an HTTP Client instance and configure the proxy server HttpClient httpClient = HttpClient.newBuilder() .proxy(proxy) .build(); // Create HTTP request HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://www.example.com")) .build(); // Send HTTP request try { HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } catch (Exception e) { e.printStackTrace(); } } } ``` Summarize: Through this guide, you have learned how to integrate with the proxy server in the HTTP Client framework in the Java library.You have learned the steps of creating an HTTP Client instance, configuration proxy server, and certification proxy server, and deepen your understanding through the Java code example.With these steps and sample code, you can easily achieve integration with the proxy server in the Java application.