The working principles and design ideas of the Holmes framework The Holmes framework is a Java open source information extraction tool to extract structured semantic information from no structured text data.Its design idea is to combine natural language processing with machine learning to achieve efficient and accurate information extraction. The working principle of the Holmes framework is based on the following key steps: 1. Data pre -processing: First, text data needs to be prepared.It will be divided into appropriate units such as articles, paragraphs or sentences, and performs words such as word division, word marking. 2. Feature extraction: During the feature extraction phase, the Holmes framework uses a variety of linguistic features to convert text data into a form that machine learning algorithms can understand.Common features include phobos models, TF-IDF, word marking, sentence analysis, etc. 3. Entity recognition: The Holmes framework recognizes the entities in the text through the training model, such as human names, place names, time, etc.This is usually implemented by a supervision learning algorithm (such as a conditioned random airport) or an unsupervised learning algorithm (such as a cluster algorithm). 4. Relations: During the extraction stage, the Holmes framework identifies the semantic relationship between them by digging the relationship between the entities in the text.Common relationship extraction methods include regular methods, mode matching methods, and machine learning -based methods. 5. Results output: Finally, the Holmes framework will output the structured information output as a specified format, such as XML, JSON or database.In this way, users can easily analyze information, visualization or other follow -up processing. The following is a simple Java code example using the Holmes framework for physical recognition: ```java import com.basistech.holmes.annotation.Entity; import com.basistech.holmes.annotation.EntityType; import com.basistech.holmes.hmm.EntityRecognizer; public class EntityRecognitionExample { public static void main(String[] args) { // Example a physical recognition device EntityRecognizer recognizer = new EntityRecognizer(); // Set the physical type and corresponding model file path recognizer.setEntityType(EntityType.PERSON, "person_model.bin"); recognizer.setEntityType(EntityType.LOCATION, "location_model.bin"); // Text to physical recognition String text = "John Du is a famous composer, he was born in New York, USA." // Execute physical identification Entity[] entities = recognizer.extract(text); // Output recognized entities and types for (Entity entity : entities) { System.out.println ("entity: + Entity.GetentityText () +", type: " + Entity.GetentityType ()); } } } ``` Through the above example code, you can see the physical recognition function of the Holmes framework.Users can provide different types of model files as needed to identify different physical types.

Use the Jain SIP RI framework to implement the development guidelines for the SIP protocol SIP (session initialization protocol) is an application layer protocol for establishing, modifying, and termination of multimedia session on the IP network.Jain SIP RI (Reference Implementation) is an SIP development toolkit implemented in Java language that can be used to build SIP clients and servers. This article will introduce how to use the Jain SIP RI framework to develop the SIP protocol and provide relevant Java code examples. 1. Install the Jain SIP RI framework First, you need to download and install the Jain SIP RI framework.You can download the source code package or binary package from the official website (https://github.com/restcomm/jain-sip).After decompression, add library files to your Java project. 2. Create a SIP user agent (user agent) In SIP, the user agent is the main entity of session interaction.You can use the Jain SIP RI framework to create a SIP user agent.The following is an example code: ```java import javax.sip.*; import javax.sip.address.*; import javax.sip.header.*; import javax.sip.message.*; public class SipUserAgent implements SipListener { private SipFactory sipFactory; private SipStack sipStack; private SipProvider sipProvider; private AddressFactory addressFactory; private HeaderFactory headerFactory; private MessageFactory messageFactory; public SipUserAgent() throws PeerUnavailableException, TransportNotSupportedException, InvalidArgumentException { this.sipFactory = SipFactory.getInstance(); this.sipFactory.setPathName("gov.nist"); this.sipStack = this.sipFactory.createSipStack(); this.addressFactory = this.sipFactory.createAddressFactory(); this.headerFactory = this.sipFactory.createHeaderFactory(); this.messageFactory = this.sipFactory.createMessageFactory(); } // Add related SIP event processing code } ``` 3. Implement SIP event processing The Jain SIP RI framework uses the Siplistener interface to handle various events of SIP, such as receiving an SIP request or response.You can implement this interface and cover the corresponding method as needed.The following is a simple example: ```java public class SipUserAgent implements SipListener { // omit the previous code @Override public void processRequest(RequestEvent requestEvent) { // Process the received SIP request } @Override public void processResponse(ResponseEvent responseEvent) { // Treat the received SIP response } // Add other methods defined in other SIPLISTENER interfaces } ``` 4. Start the SIP user agent In your main application, you can create a Sipuseragent instance and start it.The following is an example code: ```java public class MainApp { public static void main(String[] args) throws Exception { SipUserAgent userAgent = new SipUserAgent(); userAgent.sipStack.start(); // After starting the SIP user agent, you can perform other operations, such as registration, sending SIP requests, etc. } } ``` Through these steps, you can use the Jain SIP RI framework to implement the development of the SIP protocol.You can further study and explore as needed, such as implementing SIP registration, sending SIP requests, etc. I hope the guide provided in this article will help you develop the SIP protocol development in using the Jain SIP RI framework.

The Jeromq framework is a high -performance message queue written in Java language, which is implemented based on the Zeromq protocol.Zeromq is a simple and powerful message communication library that provides a variety of message transmission modes and reliable data transmission.The Jeromq framework has made some improvements and optimizations on the basis of Zeromq, making it easier and efficient in the Java language environment. The technical principles of the Jeromq framework can be divided into the following aspects for in -depth analysis: 1. Zeromq protocol: The ZEROMQ protocol is a lightweight message transmission protocol that supports multiple message modes, including request-response mode, release-subscription mode, pipeline mode, etc.These modes can meet different communication needs, so that applications can pass messages quickly and reliable.Jeromq framework provides a simple and powerful API by implementing the Zeromq protocol for developers. 2. thread model: The JeromQ framework uses a multi -threaded model to achieve message sending and receiving.It places the operation and receive operations in different threads to improve concurrent performance and throughput.The Jeromq framework uses a thread pool to manage threads, effectively reuse thread resources and reduce the overhead of thread creation and destruction. 3. Asynchronous communication: The Jeromq framework supports asynchronous communication, which can process the sending and receiving by the callback function.When the message is sent or received, the Jeromq framework will automatically call the registered callback function for processing.This asynchronous communication model can improve the system's response speed and concurrent performance, so that applications can better process a lot of messages. Below is a simple example code that demonstrates the use of the Jeromq framework: ```java import org.zeromq.SocketType; import org.zeromq.ZMQ; import org.zeromq.ZContext; public class JeroMQExample { public static void main(String[] args) { try (ZContext context = new ZContext()) { // Create a zeromq socket ZMQ.Socket socket = context.createSocket(SocketType.REQ); // Connect to the address of the message queue socket.connect("tcp://localhost:5555"); // Send a message String message = "Hello, JeroMQ!"; socket.send(message.getBytes(), 0); // Waiting for receiving reply byte[] reply = socket.recv(0); System.out.println("Received reply: " + new String(reply)); // Turn off the collaborative word and context socket.close(); } catch (Exception e) { e.printStackTrace(); } } } ``` In the above sample code, a Zeromq socket is first created and connected to the specified message queue address.Then, send a message and wait for the receipt.Finally, turn off the collie and context. The above is the in -depth analysis of the technical principle of Jeromq framework.By understanding the principles of the underlying implementation of the Jeromq framework, we can better understand its characteristics and advantages, and then better apply and optimize the process of message transmission.

Reflext Framework is a lightweight library for reflective operations in the Java class library.This article will explore the principles of the API of Reflext Framework and show its application in the Java class library. First, let's understand the concept of reflection.Reflection refers to dynamically obtaining a class information during runtime, such as class methods, fields, and constructor functions.Java's reflection mechanism provides a program that can be used as the ability of the object when runtime, inspection and modification. Reflext Framework By simplifying the use of the Java reflection API, developers can more conveniently perform reflection operations.It provides a simple and powerful API that can better organize and process structural information. The core principle of Reflext Framework is to obtain structural information by using the Java's reflection mechanism and encapsulate it in the API.It provides a series of methods that can obtain information such as fields, methods, constructors, etc., and can call them dynamically. Let's take a look at the application example of Reflext Framework in the Java class library. First of all, we need to introduce the relevant dependencies of Reflext Flext framework. You can add the following dependencies to the pom.xml file of the project: ```xml <dependency> <groupId>com.github.rafvalle</groupId> <artifactId>reflext</artifactId> <version>1.0.0</version> </dependency> ``` Suppose we have a Person class with the following structure: ```java public class Person { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public int getAge() { return age; } private void printInfo() { System.out.println("Name: " + name + ", Age: " + age); } } ``` We can now use Reflext Framework to operate this class.For example, we can obtain the field list of the Person class in the following ways: ```java import com.github.rafvalle.reflext.Reflext; public class Main { public static void main(String[] args) { List<Field> fields = Reflext.forClass(Person.class).getFields(); for (Field field : fields) { System.out.println("Field: " + field.getName()); } } } ``` The above code will output the following content: ``` Field: name Field: age ``` Through Reflext Framework, we can get all fields in the Person class and print their names. In addition to obtaining field information, we can also call the Reflext Framework.For example, we can use the following code to call the private method of the Person class, Printinfo (): ```java import com.github.rafvalle.reflext.Reflext; public class Main { public static void main(String[] args) throws Exception { Reflext.forClass(Person.class) .newInstance("John", 25) .invokeMethod("printInfo"); } } ``` The above code will output the following content: ``` Name: John, Age: 25 ``` Through the Reflext Framework, we successfully instantly instinctively checked the Person class and called the private method PrintInfo (). In summary, Reflext Framework provides a simple and powerful way for Java developers to handle reflex operations.Its API principle is based on Java's reflection mechanism. By encapsulation and simplification, developers can more easily obtain class structural information and dynamically operate them.

The importance of the WAFFLE framework in Java programming In Java development, security certification is an important aspect.The WAFFLE framework is an open source Java library for Windows identity authentication. It provides a simple and secure way to manage the identity verification of Windows users and implement single-point login (SIGN-ON) features in Java applications.EssenceThrough integration with Windows operating systems, the WAFFLE framework allows developers to easily realize identity verification based on Windows users, thereby providing higher security in enterprise applications. First of all, the WAFFLE framework provides a simple and easy -to -use API, allowing developers to easily integrate the identity certification of Windows users in Java applications.With the help of the Waffle framework, developers can verify the credentials of Windows users through some simple code lines without writing tedious processing logic.The following is a simple example that shows the Java code that uses the WAFFLE framework for Windows identity authentication: ```java import waffle.windows.auth.IWindowsAuthProvider; import waffle.windows.auth.impl.WindowsAuthProviderImpl; public class WindowsAuthenticationExample { public static void main(String[] args) { IWindowsAuthProvider authProvider = new WindowsAuthProviderImpl(); boolean isAuthenticated = authProvider.isWindowsAuthenticated(); if (isAuthenticated) { // The identity verification is successful and the corresponding logic is executed System.out.println ("Windows user has been verified"); } else { // Identity verification failed, and the corresponding logic is executed System.out.println ("Windows user has not passed verification"); } } } ``` In the above sample code, we use the `WindowsAuthProviderimpl` implementation class provided by the WAFFLE framework to create a Windows identity certification provider and use the` iswindowsAuthenticated` method to verify whether the user has passed the Windows identity verification.If the verification is successful, you can execute your logical code under the corresponding conditions. Secondly, the Waffle framework also realizes the single -point login (SSO) function, which is often very important for enterprise applications.Through the Waffle framework, you can realize a single -point login based on Windows credentials, which means that once the user logs in on the Windows system, they can access your Java application without entering the credentials again.The advantage of this is obvious: the user experience is improved and the additional operation of the user has been reduced. In addition to authentication and single -point login function, the WAFFLE framework also provides some other functions, such as the integration of Windows group and character, and support for Windows security identifier (SID).Through these functions, developers can easily manage and operate Windows users and groups, and achieve more advanced security functions in Java applications. All in all, the importance of the Waffle framework in Java programming cannot be ignored.It simplifies the realization of Windows identity verification, provides a single -point login function, and other advanced functions related to Windows users and groups.If you need to integrate Windows identity authentication in Java applications, or want to provide users with better user experience and security, the Waffle framework is a choice worth considering. I hope this article will help you understand the importance of the Waffle framework in Java programming.If you have any other questions about the Waffle framework or more example code, please ask questions at any time.

Use Jakarta Standard Tag Library (JSTL) API to develop web applications Introduction: JSTL is a standard labeling library for developing the Javaweb application. It provides many labels for handling common tasks, such as iteration, conditions, formatting.This article will introduce you how to use Jakarta Standard Tag Library API to develop Web applications and provide corresponding Java code examples. Step 1: Configure item First, you need to include the JSTL library file in the project path.You can add dependencies by downloading Jakarta standard label database and adding it to the project, or through building tools such as Maven or Gradle.Make sure to configure the reference to the jstl tag library in the web.xml file of the project. Step 2: Introduce JSTL Tag Library In your JSP page, you need to introduce the JSTL label library to use the label.You can import the JSTL tag library through the following ways: <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> Step 3: Use the JSTL tag Next, you can use JSTL tags on the JSP page to complete various tasks.Here are some commonly used JSTL label examples: 1. iteration label: <c:forEach var="item" items="${items}"> ${item} </c:forEach> This example will traverse the ITEMS collection and display each element one by one. 2. Condition label: <c:if test="${condition}"> The condition is the content displayed when the real time </c:if> This example will determine whether the content is displayed based on the value of the Condition variable. 3. Formatting tags: <fmt:formatNumber value="${number}" pattern="#,###" /> This example will format the value of the NUMBER variable and use the specified mode to display. Step 4: Writing business logic In addition to using the JSTL label on the JSP page, you can also use the JSTL API in the Java code to process more complex business logic.The following is an example: @Controller public class MyController { @RequestMapping("/hello") public String hello(Model model) { List<String> items = Arrays.asList("item1", "item2", "item3"); model.addAttribute("items", items); return "hello"; } } This example demonstrates how to pass the Items list to the JSP page in the controller. Step 5: Create the JSP page Finally, you need to create a JSP page to display your data and JSTL tags.The following is an example: <html> <head> <title>Hello JSTL</title> </head> <body> <ul> <c:forEach var="item" items="${items}"> <li>${item}</li> </c:forEach> </ul> </body> </html> This example will display the value in the Items list on the page. Summarize: By using Jakarta Standard Tag Library API, you can easily develop Web applications with rich functions and use the JSTL tag library to simplify the processing of common tasks.In this article, we introduce how to configure projects, introduce JSTL tag libraries, use JSTL tags and write business logic, and provide corresponding Java code examples.I hope this article can help you quickly use the JSTL API to develop Web applications. Java code example:

ABCL armed bear public LISP framework: entry tutorial and use guide ABCL armed bear public LISP framework is a powerful, open -source LISP interpreter and development environment, which aims to provide a modern, object -oriented programming framework.It adopts the COMMON LISP language standard and is integrated with Java to enable developers to easily write high -efficiency, scalable and easy -to -maintain applications. Getting started tutorial: 1. Install the ABCL framework To start using the ABCL framework, you need to install it in your development environment first.You can find the latest version on the download page of the official website of ABCL and install it according to the instructions. 2. Configure the development environment Once the installation is complete, you need to configure your development environment in order to correctly call the ABCL framework.This involves setting the Java path and ABCL library path, so that the Java virtual machine can find and load the necessary library files. 3. Write the hello world program Now you can start writing your first abclitrier.Below is a simple example, showing how to print "Hello, World!":: Hello, World! ":: ```java import org.armedbear.lisp.*; public class HelloWorld { public static void main(String[] args) { Environment environment = new Environment(); LispObject result = environment.eval("(print \"Hello, World!\")"); System.out.println(result); } } ``` In the above example, we created a new environment and used the `Eval` function to perform a Lisp expression.Finally, we use Java's `System.out.println` method to print the result to the console. user's guidance: 1. LISP grammar and characteristics The ABCL framework supports the Common Lisp language standard and provides rich Lisp syntax and characteristics.You can use the powerful functions of LISP, such as macro, closure and recursive functions to write flexible and easy -to -maintain code. 2. Deep integration of Java and LISP The ABCL framework makes full use of the interoperability of Java and Lisp, so that you can seamlessly use the Java class and methods in the code.You can easily call the Java library, write Java extensions, and use a third -party library in Java. 3. Efficient application development The ABCL framework provides many optimization and tools for accelerating the development process of applications.It optimizes the compilation and execution of the LISP code, and provides a thread -based concurrent support to improve the performance of the application. Summarize: The ABCL armed bear public LISP framework is a powerful and easy -to -use LISP development framework, which provides many useful functions and tools.By learning the entry tutorial and use guide, you will be able to get started quickly and start developing your own LISP application.Get full play to creativity and enjoy the fun of using the ABCL framework!

Excel Templater is a framework used in the Java library to process Excel files. It provides a simple and flexible way to generate and modify the Excel file.However, when processing a large amount of data and complex formats, Excel Templater may cause performance problems.This article will introduce some performance optimization techniques for the Excel Templateer framework, and provide Java code example for the situation required. 1. Use the appropriate data structure: When using Excel Templateer to generate an excel file, make sure to use the appropriate data structure to store data.If the amount of data is large, you can consider using the XSSF model similar to Apache Poi to process it, which can improve performance and reduce memory consumption. Example code: ```java Workbook workbook = new XSSFWorkbook(); Sheet sheet = workbook.createSheet("Sheet1"); // A lot of data processing for (int row = 0; row < data.size(); row++) { Row excelRow = sheet.createRow(row); List<Object> rowData = data.get(row); for (int col = 0; col < rowData.size(); col++) { Cell cell = excelRow.createCell(col); cell.setCellValue(rowData.get(col).toString()); } } ``` 2. Use template cache: Excel Templateer framework supports the use of templates to generate excel files.If you use the same template when generating the excel file multiple times, you can consider cache the template to avoid repeatedly reading and parsing the template file to improve performance. Example code: ```java WorkbookTemplate template = new WorkbookTemplate(new File("template.xlsx")); // cache template template.cacheTemplate(); // Multiple generate excel files for (int i = 0; i < 10; i++) { Workbook workbook = template.generate(); workbook.write(new FileOutputStream("output_" + i + ".xlsx")); } ``` 3. Batch operation: If a large number of modification operations are required in the Excel file, you can consider using the batch processing method to avoid the operation of the cell one by one, thereby improving performance. Example code: ```java Workbook workbook = new XSSFWorkbook(); Sheet sheet = workbook.createSheet("Sheet1"); // Batch modification unit format CellStyle cellStyle = workbook.createCellStyle(); cellStyle.setFillForegroundColor(IndexedColors.RED.getIndex()); cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND); for (int row = 0; row < data.size(); row++) { Row excelRow = sheet.createRow(row); List<Object> rowData = data.get(row); for (int col = 0; col < rowData.size(); col++) { Cell cell = excelRow.createCell(col); cell.setCellValue(rowData.get(col).toString()); Cell.SetCellStyle (CellStyle); // Batch setting unit format format } } ``` 4. Avoid frequent file reading and writing: When using the Excel Templateer framework, avoid frequent file reading and writing operations, you can consider saving the generated Excel file in memory, and the last one to write files to improve performance. Example code: ```java Workbook workbook = new XSSFWorkbook(); Sheet sheet = workbook.createSheet("Sheet1"); // data processing // Save in memory ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); workbook.write(outputStream); // Last one -time writing file FileOutputStream fileOutputStream = new FileOutputStream("output.xlsx"); outputStream.writeTo(fileOutputStream); fileOutputStream.close(); outputStream.close(); ``` These are some performance optimization techniques for the Excel Templator framework, which can improve the processing speed and performance when processing a large amount of data and complex formats.According to specific needs and scenes, you can choose the appropriate optimization method to improve Excel processing performance.

The Wicket framework is a Java -based open source web application framework. It provides a strong AJAX support that enables developers to achieve dynamic and interactive user interfaces in Web applications.This article will introduce the AJAX support and usage method in the Wicket framework, and provide some Java code examples. 1. Wicket framework and Ajax The Wicket framework is a component web framework that allows developers to use Java code to build a web application interface.Compared with other Web frameworks, Wicket uses an object -oriented programming model to treat the web interface as a layered structure of a set of components and process user interaction by triggering events. AJAX (Asynchronous Javascript and XML) is a technology used to load data and update interface asynchronous in Web applications.Wicket provides a built -in AJAax support, enabling developers to easily realize dynamic and interactive user interface without writing complicated JavaScript code. 2. Ajax support in Wicket 1. AjaxLink AJAXLINK is one of the components used in Wicket to handle the Ajax event.It inherits from the Link component and allows developers to add AJAX behavior to the link.The following is an example code using AjaxLink: ```java AjaxLink<Void> ajaxLink = new AjaxLink<Void>("myLink") { @Override public void onClick(AjaxRequestTarget target) { // Here } }; add(ajaxLink); ``` 2. AjaxButton AJAXBUTTON is a button component for handling the Ajax event in WICKET.It inherits from Button components and allows developers to add AJAX behavior to the button.The following is an example code using Ajaxbutton: ```java Form<?> form = new Form<>("myForm"); add(form); AjaxButton ajaxButton = new AjaxButton("myButton", form) { @Override protected void onSubmit(AjaxRequestTarget target) { // Here } }; form.add(ajaxButton); ``` 3. AjaxFormComponentUpdatingBehavior AjaxFormcomComponentupDatingBehavior is a behavioral component used to process form components to update events in WICKET.It allows developers to perform AJAX operations when the value of the form component changes.The following is an example code that uses AjaxFormcomComPonentupDatingBehavior: ```java TextField<String> textField = new TextField<>("myTextField"); textField.add(new AjaxFormComponentUpdatingBehavior("change") { @Override protected void onUpdate(AjaxRequestTarget target) { // Here } }); add(textField); ``` Third, use the AJAX function of Wicket To use the AJAX function in Wicket, you need to follow the steps below: 1. Add the AJAX dependency library of Wicket to the project. 2. Create a class that inherits from Webpage and adds the required components to its constructor. 3. Add the corresponding AJAX behavior to the components that need to handle the Ajax event, such as AjaxLink, Ajaxbutton or AjaxFormcomComponentupingBehavior. 4. Implement specific logic in the AJAX event handling method. 5. Rendering components in an appropriate manner in the page so that it can display and interact in the browser. Fourth, summary The WICKET framework provides strong AJAX support, allowing developers to easily realize dynamic and interactive user interfaces.This article introduces several commonly used AJAX components and behaviors in Wicket, and provides corresponding Java code examples.By using the Wicket's AJAX function, developers can more conveniently build a modern web application.

Excel Templateer framework is an open source framework for generating Excel documents. The main feature is that the template is used to define the style and structure of Excel documents.The template engine in the Java class library is a tool for analyzing and filling the template, which can be used to realize the function of dynamically generating various documents.This article will introduce how to integrate the Excel Templateer framework and template engine in the Java project. 1. Use of Excel Templateer framework The Excel Templateer framework is simple and flexible. Before use, you need to define an Excel template. The template can contain various styles and place occupies.The placeholders are used to mark the position of the filling data, such as using {{name}} to represent the position of the name.Then the API provided by the Excel Template frame can dynamically replace the seat occupies and generate the final Excel document. 2. Integration of template engine In the Java project, we can use the template engine to analyze the template required for the Excel Templateer framework and dynamically fill the data.The commonly used template engines include FreeMarker, Velocity, etc., here are described in FREMARKER as an example. 1. Introduce freemarker dependencies The dependencies of the introduction of FreeMarker in the pom.xml file of the project: ```xml <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> </dependency> ``` 2. Prepare Excel template First prepare an Excel template file, named the template file as template.xlsx or template.xls, and place the style and placeholder in the template file according to the requirements. 3. Use FreeMarker parsing template Use FreeMarker to parse the Excel template and replace the placeholders in the Java code: ```java import freemarker.template.Configuration; import freemarker.template.Template; import freemarker.template.TemplateException; import java.io.*; import java.util.HashMap; import java.util.Map; public class ExcelGenerationUtil { public static void generateExcelUsingTemplater() throws IOException, TemplateException { // Load freemarker configuration Configuration configuration = new Configuration(Configuration.VERSION_2_3_30); configuration.setDefaultEncoding("UTF-8"); configuration.setClassForTemplateLoading(ExcelGenerationUtil.class, "/templates"); // Load the Excel template Template template = configuration.getTemplate("template.xlsx"); // Ready to fill in data Map<String, Object> data = new HashMap<>(); data.put("name", "John Doe"); data.put("age", 30); // Create the output stream to generate the final Excel document FileOutputStream output = new FileOutputStream("output.xlsx"); // Fill in the data and generate the final Excel document template.process(data, new OutputStreamWriter(output)); } public static void main(String[] args) { try { generateExcelUsingTemplater(); } catch (IOException | TemplateException e) { e.printStackTrace(); } } } ``` In the above code, we loaded the Freemarker configuration through the @Configuration class and specify the path of the template file.Then use the Template class to load the template file and prepare to fill in the data.Finally, the data is filled in the template.process method to the template, and the final Excel document is generated. Summarize: This article introduces the integration of the Excel Templateer framework and the template engine in the Java class library. By using a template engine to analyze Excel templates and fill in data, the Excel document can be easily generated.Taking FreeMarker as an example, I introduced how to use its parsing templates and generate Excel documents.Readers can choose the appropriate template engine according to actual needs to complete the generation of Excel documents.