httpclient 关闭连接池中无效连接

httpclient 关闭连接池中无效连接的思路：使用一个单独的线程完成连接池中的无效链接的清理，其中线程中通过HttpClientConnectionManager 的 closeExpiredConnections 方法来关闭无效连接

示例：

package com._656463.httpclient;
 
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
 
public class ClientEvictExpiredConnections {
 
    public static void main(String[] args) throws Exception {
        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
        // 设置最大连接数
        cm.setMaxTotal(200);
        // 设置每个主机地址的并发数
        cm.setDefaultMaxPerRoute(20);
 
        new IdleConnectionEvictor(cm).start();
    }
 
    public static class IdleConnectionEvictor extends Thread {
 
        private final HttpClientConnectionManager connMgr;
 
        private volatile boolean shutdown;
 
        public IdleConnectionEvictor(HttpClientConnectionManager connMgr) {
            this.connMgr = connMgr;
        }
 
        @Override
        public void run() {
            try {
                while (!shutdown) {
                    synchronized (this) {
                        wait(5000);
                        // 关闭失效的连接
                        connMgr.closeExpiredConnections();
                    }
                }
            } catch (InterruptedException ex) {
                // 结束
            }
        }
 
        public void shutdown() {
            shutdown = true;
            synchronized (this) {
                notifyAll();
            }
        }
    }
}

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