springboot 集成netty web项目（一个成功的码农需要了解Netty与Spring）
springboot 集成netty web项目（一个成功的码农需要了解Netty与Spring）netty: port: 111117.NettyConfig.java// 封装的返回信息枚举类 import com.edu.hart.modules.communicate.ResponseCodeEnum; // 封装的返回信息实体类 import com.edu.hart.modules.communicate.ResponseResult; // 封装的连接常量类 import com.edu.hart.modules.constant.NettyConstant; // 记录元方法信息的实体类 import com.edu.hart.rpc.entity.MethodInvokeMeta; // 对于返回值为空的一个处理 import com.edu.hart.rpc.entity.NullWritable; // 封装的返回信息实体工具类 import com.edu.
最近有朋友向我询问一些Netty与SpringBoot整合的相关问题，这里，我就总结了一下基本整合流程，也就是说，这篇文章 ，默认大家是对netty与Spring，SpringMVC的整合是没有什么问题的。现在，就进入正题吧。
Server端：#总的来说，服务端还是比较简单的，自己一共写了三个核心类。分别是
- NettyServerListener：服务启动监听器
- ServerChannelHandlerAdapter：通道适配器，主要用于多线程共享
- RequestDispatcher：请求分排器
下面开始集成过程：
- 在pom.xml中添加以下依赖
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>5.0.0.Alpha2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
2.让SpringBoot的启动类实现CommandLineRunner接口并重写run方法 比如我的启动类是CloudApplication.java
@SpringBootApplication
public class CloudApplication implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(CloudApplication.class args);
}
@Override
public void run(String... strings) {
}
}
3.创建类NettyServerListener.java
// 读取yml的一个配置类
import com.edu.hart.modules.constant.NettyConfig;
// Netty连接信息配置类
import com.edu.hart.modules.constant.NettyConstant;
//
import com.edu.hart.RPC.util.ObjectCodec;
import io.netty.bootstrap.Serverbootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
/**
* 服务启动监听器
*
* @author 叶云轩
*/
@Component
public class NettyServerListener {
/**
* NettyServerListener 日志输出器
*
* @author 叶云轩 create by 2017/10/31 18:05
*/
private static final Logger LOGGER = LoggerFactory.getLogger(NettyServerListener.class);
/**
* 创建bootstrap
*/
ServerBootstrap serverBootstrap = new ServerBootstrap();
/**
* BOSS
*/
EventLoopGroup boss = new NioEventLoopGroup();
/**
* Worker
*/
EventLoopGroup work = new NioEventLoopGroup();
/**
* 通道适配器
*/
@Resource
private ServerChannelHandlerAdapter channelHandlerAdapter;
/**
* NETT服务器配置类
*/
@Resource
private NettyConfig nettyConfig;
/**
* 关闭服务器方法
*/
@PreDestroy
public void close() {
LOGGER.info("关闭服务器....");
//优雅退出
boss.shutdownGracefully();
work.shutdownGracefully();
}
/**
* 开启及服务线程
*/
public void start() {
// 从配置文件中(application.yml)获取服务端监听端口号
int port = nettyConfig.getPort();
ServerBootstrap.group(boss work)
.channel(NioServerSocketChannel.class)
.option(ChannelOption.SO_BACKLOG 100)
.handler(new LoggingHandler(LogLevel.INFO));
try {
//设置事件处理
serverBootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(new LengthFieldBasedFrameDecoder(nettyConfig.getMaxFrameLength()
0 2 0 2));
pipeline.addLast(new LengthFieldPrepender(2));
pipeline.addLast(new ObjectCodec());
pipeline.addLast(channelHandlerAdapter);
}
});
LOGGER.info("netty服务器在[{}]端口启动监听" port);
ChannelFuture f = serverBootstrap.bind(port).sync();
f.channel().closeFuture().sync();
} catch (InterruptedException e) {
LOGGER.info("[出现异常] 释放资源");
boss.shutdownGracefully();
work.shutdownGracefully();
}
}
}
4.创建类ServerChannelHandlerAdapter.java - 通道适配器
// 记录调用方法的元信息的类
import com.edu.hart.rpc.entity.MethodInvokeMeta;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
/**
* 多线程共享
*/
@Component
@Sharable
public class ServerChannelHandlerAdapter extends ChannelHandlerAdapter {
/**
* 日志处理
*/
private Logger logger = LoggerFactory.getLogger(ServerChannelHandlerAdapter.class);
/**
* 注入请求分排器
*/
@Resource
private RequestDispatcher dispatcher;
@Override
public void exceptionCaught(ChannelHandlerContext ctx Throwable cause) {
cause.printStackTrace();
ctx.close();
}
@Override
public void channelRead(ChannelHandlerContext ctx Object msg) {
MethodInvokeMeta invokeMeta = (MethodInvokeMeta) msg;
// 屏蔽toString()方法
if (invokeMeta.getMethodName().endsWith("toString()")
&& !"class java.lang.String".equals(invokeMeta.getReturnType().toString()))
logger.info("客户端传入参数 :{} 返回值：{}"
invokeMeta.getArgs() invokeMeta.getReturnType());
dispatcher.dispatcher(ctx invokeMeta);
}
}
5.RequestDispatcher.java
// 封装的返回信息枚举类
import com.edu.hart.modules.communicate.ResponseCodeEnum;
// 封装的返回信息实体类
import com.edu.hart.modules.communicate.ResponseResult;
// 封装的连接常量类
import com.edu.hart.modules.constant.NettyConstant;
// 记录元方法信息的实体类
import com.edu.hart.rpc.entity.MethodInvokeMeta;
// 对于返回值为空的一个处理
import com.edu.hart.rpc.entity.NullWritable;
// 封装的返回信息实体工具类
import com.edu.hart.rpc.util.ResponseResultUtil;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.executors;
/**
* 请求分排器
*/
@Component
public class RequestDispatcher implements ApplicationContextAware {
private ExecutorService executorService = Executors.newFixedThreadPool(NettyConstant.getMaxThreads());
private ApplicationContext app;
/**
* 发送
*
* @param ctx
* @param invokeMeta
*/
public void dispatcher(final ChannelHandlerContext ctx final MethodInvokeMeta invokeMeta) {
executorService.submit(() -> {
ChannelFuture f = null;
try {
Class<?> interfaceClass = invokeMeta.getInterfaceClass();
String name = invokeMeta.getMethodName();
Object[] args = invokeMeta.getArgs();
Class<?>[] parameterTypes = invokeMeta.getParameterTypes();
Object targetObject = app.getBean(interfaceClass);
Method method = targetObject.getClass().getMethod(name parameterTypes);
Object obj = method.invoke(targetObject args);
if (obj == null) {
f = ctx.writeAndFlush(NullWritable.nullWritable());
} else {
f = ctx.writeAndFlush(obj);
}
f.addListener(ChannelFutureListener.CLOSE);
} catch (Exception e) {
ResponseResult error = ResponseResultUtil.error(ResponseCodeEnum.SERVER_ERROR);
f = ctx.writeAndFlush(error);
} finally {
f.addListener(ChannelFutureListener.CLOSE);
}
});
}
/**
* 加载当前application.xml
*
* @param ctx
* @throws BeansException
*/
public void setApplicationContext(ApplicationContext ctx) throws BeansException {
this.app = ctx;
}
}
6.application.yml文件中对于netty的一个配置
netty:
port: 11111
7.NettyConfig.java
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
* 读取yml配置文件中的信息
* Created by 叶云轩 on 2017/10/31 - 18:38
* Concat tdg_yyx@foxmail.com
*/
@Component
@ConfigurationProperties(prefix = "netty")
public class NettyConfig {
private int port;
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
}
8.NettyConstanct.java
import org.springframework.stereotype.Component;
/**
* Netty服务器常量
* Created by 叶云轩 on 2017/10/31 - 17:47
* Concat tdg_yyx@foxmail.com
*/
@Component
public class NettyConstant {
/**
* 最大线程量
*/
private static final int MAX_THREADS = 1024;
/**
* 数据包最大长度
*/
private static final int MAX_FRAME_LENGTH = 65535;
public static int getMaxFrameLength() {
return MAX_FRAME_LENGTH;
}
public static int getMaxThreads() {
return MAX_THREADS;
}
}
至此，netty服务端算是与SpringBoot整合成功。那么看一下启动情况吧。
Client我感觉要比Server端要麻烦一点。这里还是先给出核心类吧。
- NettyClient ： netty客户端
- ClientChannelHandlerAdapter ： 客户端通道适配器
- CustomChannelInitalizer：自定义通道初始化工具
- RPCProxyFactoryBean：RPC通信代理工厂
在Client端里。SpringBoot的启动类要继承SpringBootServletInitializer这个类，并覆盖SpringApplicationBuilder方法
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
@SpringBootApplication
public class OaApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(OaApplication.class args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(OaApplication.class);
}
}
1.NettyClient.java
// 记录元方法信息的实体类
import com.edu.hart.rpc.entity.MethodInvokeMeta;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.management.MBeanServer;
/**
* 客户端发送类
* Created by 叶云轩 on 2017/6/16-16:58
* Concat tdg_yyx@foxmail.com
*/
public class NettyClient {
private Logger logger = LoggerFactory.getLogger(MBeanServer.class);
private Bootstrap bootstrap;
private EventLoopGroup worker;
private int port;
private String url;
private int MAX_RETRY_TIMES = 10;
public NettyClient(String url int port) {
this.url = url;
this.port = port;
bootstrap = new Bootstrap();
worker = new NioEventLoopGroup();
bootstrap.group(worker);
bootstrap.channel(NioSocketChannel.class);
}
public void close() {
logger.info("关闭资源");
worker.shutdownGracefully();
}
public Object remoteCall(final MethodInvokeMeta cmd int retry) {
try {
CustomChannelInitializerClient customChannelInitializer = new CustomChannelInitializerClient(cmd);
bootstrap.handler(customChannelInitializer);
ChannelFuture sync = bootstrap.connect(url port).sync();
sync.channel().closeFuture().sync();
Object response = customChannelInitializer.getResponse();
return response;
} catch (InterruptedException e) {
retry ;
if (retry > MAX_RETRY_TIMES) {
throw new RuntimeException("调用Wrong");
} else {
try {
Thread.sleep(100);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
logger.info("第{}次尝试....失败" retry);
return remoteCall(cmd retry);
}
}
}
}
2.ClientChannelHandlerAdapter.java
import com.edu.hart.rpc.entity.MethodInvokeMeta;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Created by 叶云轩 on 2017/6/16-17:03
* Concat tdg_yyx@foxmail.com
*/
public class ClientChannelHandlerAdapter extends ChannelHandlerAdapter {
private Logger logger = LoggerFactory.getLogger(ClientChannelHandlerAdapter.class);
private MethodInvokeMeta methodInvokeMeta;
private CustomChannelInitializerClient channelInitializerClient;
public ClientChannelHandlerAdapter(MethodInvokeMeta methodInvokeMeta CustomChannelInitializerClient channelInitializerClient) {
this.methodInvokeMeta = methodInvokeMeta;
this.channelInitializerClient = channelInitializerClient;
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx Throwable cause) throws Exception {
logger.info("客户端出异常了 异常信息:{}" cause.getMessage());
cause.printStackTrace();
ctx.close();
}
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
if (methodInvokeMeta.getMethodName().endsWith("toString") && !"class java.lang.String".equals(methodInvokeMeta.getReturnType().toString()))
logger.info("客户端发送信息参数:{} 信息返回值类型：{}" methodInvokeMeta.getArgs() methodInvokeMeta.getReturnType());
ctx.writeAndFlush(methodInvokeMeta);
}
@Override
public void channelRead(ChannelHandlerContext ctx Object msg) throws Exception {
channelInitializerClient.setResponse(msg);
}
}
3.CustomChannelInitializerClient.java
import com.edu.hart.rpc.entity.MethodInvokeMeta;
import com.edu.hart.rpc.entity.NullWritable;
import com.edu.hart.rpc.util.ObjectCodec;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
- Created by 叶云轩 on 2017/6/16-15:01
- Concat tdg_yyx@foxmail.com
*/
public class CustomChannelInitializerClient extends ChannelInitializer {
private Logger logger = LoggerFactory.getLogger(CustomChannelInitializerClient.class);
private MethodInvokeMeta methodInvokeMeta;
private Object response;
public CustomChannelInitializerClient(MethodInvokeMeta methodInvokeMeta) {
if (!"toString".equals(methodInvokeMeta.getMethodName())) {
logger.info("[CustomChannelInitializerClient] 调用方法名：{}，入参：{} 参数类型：{}，返回值类型{}"
methodInvokeMeta.getMethodName()
methodInvokeMeta.getArgs()
methodInvokeMeta.getParameterTypes()
methodInvokeMeta.getReturnType());
}
this.methodInvokeMeta = methodInvokeMeta;
}
public Object getResponse() {
if (response instanceof NullWritable) {
return null;
}
return response;
}
public void setResponse(Object response) {
this.response = response;
}
@Override
protected void initChannel(SocketChannel ch) {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(new LengthFieldPrepender(2));
pipeline.addLast(new LengthFieldBasedFrameDecoder(1024 * 1024 0 2 0 2));
pipeline.addLast(new ObjectCodec());
pipeline.addLast(new ClientChannelHandlerAdapter(methodInvokeMeta this));
}
}
4. RPCProxyFactoryBean.java
import com.edu.hart.rpc.entity.MethodInvokeMeta;
import com.edu.hart.rpc.util.WrapMethodUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
/**
* Created by 叶云轩 on 2017/6/16-17:16
* Concat tdg_yyx@foxmail.com
*/
public class RPCProxyFactoryBean extends AbstractFactoryBean
private Class interfaceClass;
private NettyClient nettyClient;
@Override
public Class<?> getObjectType() {
return interfaceClass;
}
@Override
protected Object createInstance() throws Exception {
logger.info("[代理工厂] 初始化代理Bean : {}" interfaceClass);
return Proxy.newProxyInstance(interfaceClass.getClassLoader() new Class[]{interfaceClass} this);
}
@Override
public Object invoke(Object proxy Method method Object[] args) {
final MethodInvokeMeta methodInvokeMeta = WrapMethodUtils.readMethod(interfaceClass method args);
if (!methodInvokeMeta.getMethodName().equals("toString")) {
logger.info("[invoke] 调用接口{} 调用方法名：{}，入参：{} 参数类型：{}，返回值类型{}"
methodInvokeMeta.getInterfaceClass() methodInvokeMeta.getMethodName()
methodInvokeMeta.getArgs() methodInvokeMeta.getParameterTypes() methodInvokeMeta.getReturnType());
}
return nettyClient.remoteCall(methodInvokeMeta 0);
}
public void setInterfaceClass(Class interfaceClass) {
this.interfaceClass = interfaceClass;
}
public void setNettyClient(NettyClient nettyClient) {
this.nettyClient = nettyClient;
}
}
至此，netty-client与SpringBoot的集成了算完毕了。同样 ，在netty-client中也要加入相应的依赖
不过上面server与client使用了一些公共的类和工具。下面也给列举中出来。
###### MethodInvokeMeta.java
import org.springframework.stereotype.Component;
import java.io.Serializable;
/**
* 记录调用方法的元信息
* Created by 叶云轩 on 2017/6/7-15:41
* Concat tdg_yyx@foxmail.com
*/
@Component
public class MethodInvokeMeta implements Serializable {
private static final long serialVersionUID = 8379109667714148890L;
//接口
private Class<?> interfaceClass;
//方法名
private String methodName;
//参数
private Object[] args;
//返回值类型
private Class<?> returnType;
//参数类型
private Class<?>[] parameterTypes;
public Object[] getArgs() {
return args;
}
public void setArgs(Object[] args) {
this.args = args;
}
public Class<?> getInterfaceClass() {
return interfaceClass;
}
public void setInterfaceClass(Class<?> interfaceClass) {
this.interfaceClass = interfaceClass;
}
public String getMethodName() {
return methodName;
}
public void setMethodName(String methodName) {
this.methodName = methodName;
}
public Class[] getParameterTypes() {
return parameterTypes;
}
public void setParameterTypes(Class<?>[] parameterTypes) {
this.parameterTypes = parameterTypes;
}
public Class getReturnType() {
return returnType;
}
public void setReturnType(Class returnType) {
this.returnType = returnType;
}
}
###### NullWritable.java
import java.io.Serializable;
/**
* 服务器可能返回空的处理
* Created by 叶云轩 on 2017/6/16-16:46
* Concat tdg_yyx@foxmail.com
*/
public class NullWritable implements Serializable {
private static final long serialVersionUID = -8191640400484155111L;
private static NullWritable instance = new NullWritable();
private NullWritable() {
}
public static NullWritable nullWritable() {
return instance;
}
}
###### ObjectCodec.java
mport io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageCodec;
import java.util.List;
public class ObjectCodec extends MessageToMessageCodec<ByteBuf Object> {
@Override
protected void encode(ChannelHandlerContext ctx Object msg List<Object> out) {
byte[] data = ObjectSerializerUtils.serilizer(msg);
ByteBuf buf = Unpooled.buffer();
buf.writeBytes(data);
out.add(buf);
}
@Override
protected void decode(ChannelHandlerContext ctx ByteBuf msg List<Object> out) {
byte[] bytes = new byte[msg.readableBytes()];
msg.readBytes(bytes);
Object deSerilizer = ObjectSerializerUtils.deSerilizer(bytes);
out.add(deSerilizer);
}
}
###### ObjectSerializerUtils.java
package com.edu.hart.rpc.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
/**
* 对象序列化工具
*/
public class ObjectSerializerUtils {
private static final Logger logger = LoggerFactory.getLogger(ObjectSerializerUtils.class);
/**
* 反序列化
*
* @param data
* @return
*/
public static Object deSerilizer(byte[] data) {
if (data != null && data.length > 0) {
try {
ByteArrayInputStream bis = new ByteArrayInputStream(data);
ObjectInputStream ois = new ObjectInputStream(bis);
return ois.readObject();
} catch (Exception e) {
logger.info("[异常信息] {}" e.getMessage());
e.printStackTrace();
}
return null;
} else {
logger.info("[反序列化] 入参为空");
return null;
}
}
/**
* 序列化对象
*
* @param obj
* @return
*/
public static byte[] serilizer(Object obj) {
if (obj != null) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(obj);
oos.flush();
oos.close();
return bos.toByteArray();
} catch (IOException e) {
e.printStackTrace();
}
return null;
} else {
return null;
}
}
}
下面主要是用于Client端的：
###### NettyBeanSacnner.java
import com.edu.hart.rpc.client.RPCProxyFactoryBean;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import java.util.List;
/**
* 动态加载代理bean到Spring bean工厂
*/
public class NettyBeanScanner implements BeanFactoryPostProcessor {
private DefaultListableBeanFactory beanFactory;
private String basePackage;
private String clientName;
public NettyBeanScanner(String basePackage String clientName) {
this.basePackage = basePackage;
this.clientName = clientName;
}
/**
* 注册Bean到Spring的bean工厂
*/
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
this.beanFactory = (DefaultListableBeanFactory) beanFactory;
// 加载远程服务的接口
List<String> resolverClass = PackageClassUtils.resolver(basePackage);
for (String clazz : resolverClass) {
String simpleName;
if (clazz.lastIndexOf('.') != -1) {
simpleName = clazz.substring(clazz.lastIndexOf('.') 1);
} else {
simpleName = clazz;
}
BeanDefinitionBuilder gd = BeanDefinitionBuilder.genericBeanDefinition(RPCProxyFactoryBean.class);
gd.addPropertyValue("interfaceClass" clazz);
gd.addPropertyReference("nettyClient" clientName);
this.beanFactory.registerBeanDefinition(simpleName gd.getRawBeanDefinition());
}
}
}
###### PackageClassUtils.java
**这个类要说一下，主要是用来加载Server对应的接口的。因为在Client中RPC接口没有实现类，所以要自己将这些接口加载到Spring工厂里面。但是现在有个问题就是需要使用**
###### SpringBoot中application.yml
basePackage: com.edu.hart.rpc.service.login;com.edu.hart.rpc.service.employee;com.edu.hart.rpc.service.authorization;
**这样的方式来加载，使用通配符的时候会加载不到，这个问题我还没有解决。**
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* 字节文件加载
*/
public class PackageClassUtils {
private final static Logger LOGGER = LoggerFactory.getLogger(PackageClassUtils.class);
/**
* 解析包参数
*
* @param basePackage 包名
* @return 包名字符串集合
*/
public static List<String> resolver(String basePackage) {
//以";"分割开多个包名
String[] splitFHs = basePackage.split(";");
List<String> classStrs = new ArrayList<>();
//s: com.yyx.util.*
for (String s : splitFHs) {
LOGGER.info("[加载类目录] {}" s);
//路径中是否存在".*" com.yyx.util.*
boolean contains = s.contains(".*");
if (contains) {
//截断星号 com.yyx.util
String filePathStr = s.substring(0 s.lastIndexOf(".*"));
//组装路径 com/yyx/util
String filePath = filePathStr.replaceAll("\\." "/");
//获取路径 xxx/classes/com/yyx/util
File file = new File(PackageClassUtils.class.getResource("/").getPath() "/" filePath);
//获取目录下获取文件
getAllFile(filePathStr file classStrs);
} else {
String filePath = s.replaceAll("\\." "/");
File file = new File(PackageClassUtils.class.getResource("/").getPath() "/" filePath);
classStrs = getClassReferenceList(classStrs file s);
}
}
return classStrs;
}
/**
* 添加全限定类名到集合
*
* @param classStrs 集合
* @return 类名集合
*/
private static List<String> getClassReferenceList(List<String> classStrs File file String s) {
File[] listFiles = file.listFiles();
if (listFiles != null && listFiles.length != 0) {
for (File file2 : listFiles) {
if (file2.isFile()) {
String name = file2.getName();
String fileName = s "." name.substring(0 name.lastIndexOf('.'));
LOGGER.info("[加载完成] 类文件：{}" fileName);
classStrs.add(fileName);
}
}
}
return classStrs;
}
/**
* 获取一个目录下的所有文件
*
* @param s
* @param file
* @param classStrs
*/
private static void getAllFile(String s File file List<String> classStrs) {
if (file.isDirectory()) {
File[] files = file.listFiles();
if (files != null)
for (File file1 : files) {
getAllFile(s file1 classStrs);
}
} else {
String path = file.getPath();
String cleanPath = path.replaceAll("/" ".");
String fileName = cleanPath.substring(cleanPath.indexOf(s) cleanPath.length());
LOGGER.info("[加载完成] 类文件：{}" fileName);
classStrs.add(fileName);
}
}
}
本次的内容大致的就介绍到这里拉，由于内容太多，只能简单介绍到这里，如有需要以上内容的完整版，大家可以私信我获取哦~~
