socket 简单demo

待我称王封你为后i 2022-09-24 13:20 263阅读 0赞

服务端代码；

public class SocketService {
    
    	 
    	
        public static void main(String[] args) {
        	
        	try{
        		//为了简单起见，所有的异常信息都往外抛  
                int port = 8899;  
                //定义一个ServerSocket监听在端口8899上  
                ServerSocket server = new ServerSocket(port);  
                //server尝试接收其他Socket的连接请求，server的accept方法是阻塞式的  
                Socket socket = server.accept();  
                //跟客户端建立好连接之后，我们就可以获取socket的InputStream，并从中读取客户端发过来的信息了。  
                Reader reader = new InputStreamReader(socket.getInputStream());  
                char chars[] = new char[64];  
                int len;  
                StringBuilder sb = new StringBuilder();  
                String temp;  
                 
                   temp = new String(chars, 0, reader.read(chars));  
                   sb.append(temp);  
                   System.out.println("from client:------> " + sb);  
                 
                //读完后写一句  
                Writer writer = new OutputStreamWriter(socket.getOutputStream());  
                writer.write("Hello Client.--------->麦子");  
                writer.flush();  
                writer.close();  
                reader.close();  
                socket.close();  
                server.close(); 
        		
        		
        	}catch(Exception e){
        		
        		 e.printStackTrace();
        	}
    		 
        	 
    		 
    	}
    	
    	
    
    }

OC端代码如下：

#import "ViewController.h"
    
    @interface ViewController ()<UITableViewDataSource,UITableViewDelegate,NSStreamDelegate,UITextFieldDelegate>
    
    @property (weak, nonatomic) IBOutlet UITableView *tableView;
    
    @property (nonatomic,strong) NSMutableArray *msgArray; // 对话数据
    
    
    // OC 输入输出流
    
    @property (nonatomic,strong) NSInputStream *inputStream;
    @property (nonatomic,strong) NSOutputStream *outputStream;
    
    
    @end
    
    
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        _msgArray = [[NSMutableArray alloc]init];
        for (int  i = 0; i < 10; i++) {
            [_msgArray addObject:@"测试数据--->"];
        }
        _tableView.dataSource = self;
        _tableView.delegate = self;
        [self connectionAction];
    }
    
    
    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    
       
        return 1;
    }
    
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
       
        return _msgArray.count;
    }
    
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
     
        tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
        UIView  *view = cell.contentView;
        UILabel *label = [view viewWithTag:10];
        label.text = [_msgArray objectAtIndex:indexPath.row];
        
        return cell;
    }
    
    - (void)connectionAction{
        
        NSLog(@"建立连接........");
        
        
        NSString *host = @"192.168.155.2";
        int port = 8899;
        
        // 定义C语言输入输出流
        CFReadStreamRef  readStream;
        CFWriteStreamRef writeStream;
        CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);
        
        // C语言对象输入输出流转成OC对象
        _inputStream = (__bridge NSInputStream *)(readStream);
        _outputStream = (__bridge NSOutputStream *)(writeStream);
        
        // 设置代理
        _inputStream.delegate = self;
        _outputStream.delegate = self;
        
        // 添加主运行循环
        [_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
        
        [_outputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
        
        //打开输入输出流
        [_inputStream open];
        [_outputStream open];
        
    }
    
    
    #pragma mark   NSStreamDelegate
    
    
    - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode{
    
        NSLog(@"%@",[NSThread currentThread].description);
        
        switch (eventCode) {
            case NSStreamEventOpenCompleted:
                
                NSLog(@"输入输出流打开完成");
                
                break;
                
            case NSStreamEventHasBytesAvailable:
                
                NSLog(@"有字节可以读");
                
                [self readData];
                
                break;
                
            case NSStreamEventHasSpaceAvailable:
                
                NSLog(@"可以发送字节");
                
                break;
                
            case NSStreamEventErrorOccurred:
            
                NSLog(@"连接出现错误");
                
                break;
                
            case NSStreamEventEndEncountered:
                
                NSLog(@"连接结束");
                
                // 关闭输入输出流
                
                [_inputStream close];
                [_outputStream close];
                
                //从主运行循环移除
                
                [_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
                [_outputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
                
                break;
                
            default:
                break;
        }
    }
    
    
    #pragma mark     发送数据
    
    - (void)sendData{
    
        NSString *msg = @"我是客户端数据.....";
        
        NSData *data = [msg dataUsingEncoding:NSUTF8StringEncoding];
        
        [_outputStream write:data.bytes maxLength:data.length];
    }
    
    
    #pragma mark     读取数据
    
    - (void)readData{
    
        // 缓存区域 1024
        uint8_t buf[1024];
        
        // 返回实际装的字节数
        NSInteger len = [_inputStream read:buf maxLength:sizeof(buf)];
        
        // 把字节数转成字符串
        NSData *data = [NSData dataWithBytes:buf length:len];
        
        // 从服务器返回的字符
        NSString *msg = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        
        if (msg != nil && msg.length > 0) {
            
            NSLog(@"服务器返回的字符串---->%@",msg);
            
            //  刷新TableView
            [_msgArray addObject:msg];
            [_tableView reloadData];
            
            NSIndexPath *lastPath = [NSIndexPath indexPathForRow:_msgArray.count - 1 inSection:0];
            [_tableView scrollToRowAtIndexPath:lastPath atScrollPosition:UITableViewScrollPositionBottom animated:true];
        }
    }
    
    
    - (IBAction)readAction:(id)sender {
        
     
    }
    
    
    
    - (IBAction)sendAction:(id)sender {
        
        [self sendData];
        
    }
    
    
    
    
    @end