java wifi连接

以下是Java中连接WiFi的示例代码：

import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.content.Context;

public class WifiUtil {
    private WifiManager wifiManager;

    public WifiUtil(Context context) {
        wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    }

    // 连接WiFi
    public void connectToWifi(String ssid, String password) {
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = String.format("\"%s\"", ssid);
        wifiConfig.preSharedKey = String.format("\"%s\"", password);
        int netId = wifiManager.addNetwork(wifiConfig);
        wifiManager.disconnect();
        wifiManager.enableNetwork(netId, true);
        wifiManager.reconnect();
    }

    // 获取当前连接的WiFi信息
    public String getCurrentWifiInfo() {
        WifiInfo currentWifiInfo = wifiManager.getConnectionInfo();
        return currentWifiInfo.toString();
    }

    // 将int类型的IP地址转换为String类型
    public String intToIp(int ipAddress) {
        return ((ipAddress & 0xff) + "." + (ipAddress >> 8 & 0xff) + "." + (ipAddress >> 16 & 0xff) + "." + (ipAddress >> 24 & 0xff));
    }
}

其中，connectToWifi()方法用于连接WiFi，getCurrentWifiInfo()方法用于获取当前连接的WiFi信息，intToIp()方法用于将int类型的IP地址转换为String类型。