Dubbo 2.7.0 及以上根据Dubbo注解(DubboService)生成本地调用properties文件

import org.apache.commons.lang3.StringUtils;
import org.apache.dubbo.config.annotation.DubboService;

import java.io.File;
import java.io.FileFilter;
import java.io.FileOutputStream;
import java.lang.annotation.Annotation;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

// author WatsonXh
public class Generate {

    private static final String dubboPort = "1122";    //dubbo端口 填写

    private static final String serviceName = "xxxService";  //service名称 填写

    private static final String packageName = "com.service.impl."+serviceName;

    private static final String path = "D:/dubboResolveFile/com-service-"+serviceName+"/";

    private static final String fileName = "com_service_"+serviceName+".properties";

    public static void main(String[] args) {
        List> classListByAnnotation = getClassListByAnnotation(packageName, DubboService.class);
        StringBuilder stringBuilder=new StringBuilder();
        for(Class clazz : classListByAnnotation){
            Class[] interfaces = clazz.getInterfaces();
            String interfaceName = interfaces[0].getName();
            stringBuilder.append(interfaceName);
            stringBuilder.append("=dubbo://localhost:");
            stringBuilder.append(dubboPort);
            stringBuilder.append("rn");
        }
        System.out.println(stringBuilder.toString());
        writeToFile(stringBuilder.toString());
    }


    // 获取指定包名下的所有类
    public static List> getClassList(String packageName, boolean isRecursive) {
        List> classList = new ArrayList>();
        try {
            Enumeration urls = Thread.currentThread().getContextClassLoader().getResources(packageName.replaceAll("\.", "/"));
            while (urls.hasMoreElements()) {
                URL url = urls.nextElement();
                if (url != null) {
                    String protocol = url.getProtocol();
                    if (protocol.equals("file")) {
                        String packagePath = url.getPath();
                        addClass(classList, packagePath, packageName, isRecursive);
                    } else if (protocol.equals("jar")) {
                        JarURLConnection jarURLConnection = (JarURLConnection) url.openConnection();
                        JarFile jarFile = jarURLConnection.getJarFile();
                        Enumeration jarEntries = jarFile.entries();
                        while (jarEntries.hasMoreElements()) {
                            JarEntry jarEntry = jarEntries.nextElement();
                            String jarEntryName = jarEntry.getName();
                            if (jarEntryName.endsWith(".class")) {
                                String className = jarEntryName.substring(0, jarEntryName.lastIndexOf(".")).replaceAll("/", ".");
                                if (isRecursive || className.substring(0, className.lastIndexOf(".")).equals(packageName)) {
                                    classList.add(Class.forName(className));
                                }
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return classList;
    }

    // 获取指定包名下的所有类（可根据注解进行过滤）
    public static List> getClassListByAnnotation(String packageName, Class annotationClass) {
        List> classList = new ArrayList>();
        try {
            Enumeration urls = Thread.currentThread().getContextClassLoader().getResources(packageName.replaceAll("\.", "/"));
            while (urls.hasMoreElements()) {
                URL url = urls.nextElement();
                if (url != null) {
                    String protocol = url.getProtocol();
                    if (protocol.equals("file")) {
                        String packagePath = url.getPath();
                        addClassByAnnotation(classList, packagePath, packageName, annotationClass);
                    } else if (protocol.equals("jar")) {
                        JarURLConnection jarURLConnection = (JarURLConnection) url.openConnection();
                        JarFile jarFile = jarURLConnection.getJarFile();
                        Enumeration jarEntries = jarFile.entries();
                        while (jarEntries.hasMoreElements()) {
                            JarEntry jarEntry = jarEntries.nextElement();
                            String jarEntryName = jarEntry.getName();
                            if (jarEntryName.endsWith(".class")) {
                                String className = jarEntryName.substring(0, jarEntryName.lastIndexOf(".")).replaceAll("/", ".");
                                Class cls = Class.forName(className);
                                if (cls.isAnnotationPresent(annotationClass)) {
                                    classList.add(cls);
                                }
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return classList;
    }

    private static void addClass(List> classList, String packagePath, String packageName, boolean isRecursive) {
        try {
            File[] files = getClassFiles(packagePath);
            if (files != null) {
                for (File file : files) {
                    String fileName = file.getName();
                    if (file.isFile()) {
                        String className = getClassName(packageName, fileName);
                        classList.add(Class.forName(className));
                    } else {
                        if (isRecursive) {
                            String subPackagePath = getSubPackagePath(packagePath, fileName);
                            String subPackageName = getSubPackageName(packageName, fileName);
                            addClass(classList, subPackagePath, subPackageName, isRecursive);
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static File[] getClassFiles(String packagePath) {
        return new File(packagePath).listFiles(new FileFilter() {
            @Override
            public boolean accept(File file) {
                return (file.isFile() && file.getName().endsWith(".class")) || file.isDirectory();
            }
        });
    }

    private static String getClassName(String packageName, String fileName) {
        String className = fileName.substring(0, fileName.lastIndexOf("."));
        if (StringUtils.isNotEmpty(packageName)) {
            className = packageName + "." + className;
        }
        return className;
    }

    private static String getSubPackagePath(String packagePath, String filePath) {
        String subPackagePath = filePath;
        if (StringUtils.isNotEmpty(packagePath)) {
            subPackagePath = packagePath + "/" + subPackagePath;
        }
        return subPackagePath;
    }

    private static String getSubPackageName(String packageName, String filePath) {
        String subPackageName = filePath;
        if (StringUtils.isNotEmpty(packageName)) {
            subPackageName = packageName + "." + subPackageName;
        }
        return subPackageName;
    }

    private static void addClassByAnnotation(List> classList, String packagePath, String packageName, Class annotationClass) {
        try {
            File[] files = getClassFiles(packagePath);
            if (files != null) {
                for (File file : files) {
                    String fileName = file.getName();
                    if (file.isFile()) {
                        String className = getClassName(packageName, fileName);
                        Class cls = Class.forName(className);
                        if (cls.isAnnotationPresent(annotationClass)) {
                            classList.add(cls);
                        }
                    } else {
                        String subPackagePath = getSubPackagePath(packagePath, fileName);
                        String subPackageName = getSubPackageName(packageName, fileName);
                        addClassByAnnotation(classList, subPackagePath, subPackageName, annotationClass);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void writeToFile(String data){
        byte[] sourceByte = data.getBytes();
        if(null != sourceByte){
            try {
                File file = new File(path+fileName);//文件路径（路径+文件名）
                if (!file.exists()) {   //文件不存在则创建文件，先创建目录
                    File dir = new File(file.getParent());
                    dir.mkdirs();
                    file.createNewFile();
                }
                FileOutputStream outStream = new FileOutputStream(file); //文件输出流将数据写入文件
                outStream.write(sourceByte);
                outStream.close();
            } catch (Exception e) {
                e.printStackTrace();
                // do something
            } finally {
                // do something
            }
        }
    }
}

配置JVM参数-Ddubbo.resolve.file=指定到path+fileName即可