openwrt智能网关调试总结

1.在高通智能网关路由ipq806x上，终端ping不通连接的终端设备

  解决：web登录页面在Network-》FireWall 中修改wan:wan:改为accept状态；

2.运行java应用报out of Memory error

 解决;运行java命令：java -jar xxx.jar 改为 java -Xmx32M xx.jar

 原因是默认分配的堆过小，现在改为32M。

3.扫描获取外部存储器

public static void scanAndBuildDisk(){
    
    BufferedReader bufferedReader = null;  
    Process process = null;  
    try {  
        // 获取挂载盘并以M为单位
        System.out.println("start");
        process = Runtime.getRuntime().exec("df -m");  
        // 显示信息中包含有存储器信息  
        System.out.println("process");
        bufferedReader = new BufferedReader(new InputStreamReader(  
                process.getInputStream()));  
        String line = null;  
        boolean isDisk = false;  
        LinkedHashSet mountList = new LinkedHashSet();
        while ((line = bufferedReader.readLine()) != null) {  
            // 寻找标示字符串[/dev/]  
            line = line.trim();
            isDisk = line.toLowerCase().startsWith("/dev/");  
            if (isDisk) {// 找到了  
                // 多个空格转单个空格
                line = line.replaceAll("\\s{1,}", " ");
                String[] str = line.split(" ");
                if(str.length == 6){
                    MountItem item = new MountItem(str[0],str[5],Long.valueOf(str[1]),Long.valueOf(str[3]),str[5]);
                    mountList.add(item);
                }
            }  
        }  
        
        if(mountList.size() > 0 ){
            Config.mountList.clear();
            Config.mountList.addAll(mountList);
        }else if(mountList.size() <= 0) {
            Config.mountList.clear();
        }
    } catch (IOException e) {  
        System.out.println("..getUnixMACAddress.IOException....."+e.getMessage());
        e.printStackTrace();  
    } finally {  
        System.out.println("end");
        try {  
            if (bufferedReader != null) {  
                bufferedReader.close();  
            }  
        } catch (IOException e1) {  
            e1.printStackTrace();  
        }  
        
        if(process != null){
            process.destroy();
        }
        
        bufferedReader = null;  
        process = null;  
    }   
}