android 获取url中的参数，验证邮箱格式，截取字符串中键值对的值，String的字节长度，去空格，替换字符

原创已于 2023-10-14 09:49:27 修改 · 2.6k 阅读

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#String转数组 #获取url中的参数 #String的字节长度 #去空格，替换字符

于 2018-01-17 13:41:49 首次发布

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String IPAddress = "";
InetAddress ReturnStr1 = null;
try {
    AppLog.Loge("完整域名的推送地址为："+Constant.DEVICE_PUSH_SERVER);
    URL url=new URL(Constant.DEVICE_PUSH_SERVER);
    String hostStr=url.getHost();
    int hostPort=url.getPort();

    LgqLogPlus.e("域名的端口，Port为0000："+hostStr);

    ReturnStr1 = java.net.InetAddress.getByName(hostStr);
    LgqLogPlus.e("域名的端口，Port为1111："+ReturnStr1);
    IPAddress = ReturnStr1.getHostAddress();
    LgqLogPlus.e("根据域名得到IP为22222："+IPAddress);
    UserComm.saveDognessConfig(mContext,IPAddress,hostPort);
} catch (Exception e) {
    AppLog.Loge("域名获取IP地址，获取失败");
    UserComm.saveDognessConfig(mContext,"",80);//如果获取失败情况下
    e.printStackTrace();
}

public static boolean isPwd(String str){
    boolean isDigit = false;//定义一个boolean值，用来表示是否包含数字
    boolean isLowerCase = false;//定义一个boolean值，用来表示是否包含字母
    boolean isUpperCase = false;
    for (int i = 0; i < str.length(); i++) {
        if (Character.isDigit(str.charAt(i))) {
            isDigit = true;
        } else if (Character.isLowerCase(str.charAt(i))) {
            isLowerCase = true;
        } else if (Character.isUpperCase(str.charAt(i))) {
            isUpperCase = true;
        }
    }
    String regex = "^[a-zA-Z0-9]+$";
    boolean isRight = isDigit && isLowerCase && isUpperCase && str.matches(regex);
    return isRight;
}

String ss="hello";
byte[] buff=ss.getBytes();
int f=buff.length;
System.out.println(f);

字节长度。一个中文是3。其他是1

1、获取url中的参数

创建string

String urls= "http://www.yxtribe.com/yuanxinbuluo/weixin/getJsp?url=wechatweb/business-style-five&param=330&appFlg=1";
String param= URLRequest(urls).get("param");//是330

实现方法

/**
 * 解析出url参数中的键值对
 * 如 "index.jsp?Action=del&id=123"，解析出Action:del,id:123存入map中
 * @param URL  url地址
 * @return  url请求参数部分
 */
public static Map<String, String> URLRequest(String URL)
{
    Map<String, String> mapRequest = new HashMap<String, String>();

    String[] arrSplit=null;

    String strUrlParam=TruncateUrlPage(URL);
    if(strUrlParam==null)
    {
        return mapRequest;
    }
    //每个键值为一组 www.2cto.com
    arrSplit=strUrlParam.split("[&]");
    for(String strSplit:arrSplit)
    {
        String[] arrSplitEqual=null;
        arrSplitEqual= strSplit.split("[=]");

        //解析出键值
        if(arrSplitEqual.length>1)
        {
            //正确解析
            mapRequest.put(arrSplitEqual[0], arrSplitEqual[1]);

        }
        else
        {
            if(arrSplitEqual[0]!="")
            {
                //只有参数没有值，不加入
                mapRequest.put(arrSplitEqual[0], "");
            }
        }
    }
    return mapRequest;
}

/**
 * 去掉url中的路径，留下请求参数部分
 * @param strURL url地址
 * @return url请求参数部分
 */
private static String TruncateUrlPage(String strURL)
{
    String strAllParam=null;
    String[] arrSplit=null;

    strURL=strURL.trim();

    arrSplit=strURL.split("[?]");
    if(strURL.length()>1)
    {
        if(arrSplit.length>1)
        {
            if(arrSplit[1]!=null)
            {
                strAllParam=arrSplit[1];
            }
        }
    }

    return strAllParam;
}

//处理二维码数据返回
public static String dealWithQrStr(String qrStr) {

    String useStr = qrStr;//处理后，有用的字符串

    try {
        if(qrStr.startsWith("http://") || qrStr.startsWith("https://")){
            Uri uri = Uri.parse(qrStr);
            String hostStr = uri.getHost();
            String device_mac = uri.getQueryParameter("mac");
            String device_code = uri.getQueryParameter("id");
            String device_imei = uri.getQueryParameter("imei");

            if (!IsNullString(device_mac) && !device_mac.equalsIgnoreCase("null")){
                if(!device_mac.contains(":")){
                    StringBuilder builder=new StringBuilder(device_mac);
                    for (int i = 0; i <builder.length() ; i++) {
                        if(i%3==0){ //对mac地址插入：号
                            builder.insert(i,":");
                        }
                    }
                    builder.delete(0,1);
                    useStr = builder.toString();
                }else{
                    useStr = device_mac;
                }
            }else if(!IsNullString(device_code) && !device_code.equals("null")){
                useStr = device_code;
            }else if(!IsNullString(device_imei) && !device_imei.equals("null")){
                useStr = device_imei;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return useStr;
}

//判断字符是否为空或者没数据
public static boolean IsNullString(String str) {
    if (str != null && !TextUtils.isEmpty(str) && !TextUtils.equals("", str.trim())) {
        return false;
    } else {
        return true;
    }
}

2、验证邮箱格式，电话格式，密码格式

  public static boolean isMobileNO(String mobiles) {
        String telRegex = "13\\d{9}|14[57]\\d{8}|15[012356789]\\d{8}|18[012356789]\\d{8}|17[01678]\\d{8}";
        if (TextUtils.isEmpty(mobiles)) return false;
        else return mobiles.matches(telRegex);
    }

    public static boolean passWordVerify(String pass) {
        Pattern p = Pattern.compile("^[A-Za-z0-9]{6,12}$");
        //Pattern p = Pattern.compile("^(?![0-9]+$)(?![a-zA-Z]+$)[0-9A-Za-z_]{6,12}$");
        return p.matcher(pass).matches();
    }

    public static boolean mailAddressVerify(String mailAddress) {
        String emailExp = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";
        Pattern p = Pattern.compile(emailExp);
        return p.matcher(mailAddress).matches();
    }

public static boolean isEmail(String email) {
    String str = "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)*\\.[a-zA-Z0-9]{2,6}$";
    Pattern p = Pattern.compile(str);
    Matcher m = p.matcher(email);
    return m.matches();
}

3、截取字符串中键值对的值

String data ="Address[addressLines=[0:\"广东省东莞市健升大厦\"],feature=健升大厦,admin=广东省,sub-admin=null,locality=东莞市,thoroughfare=null,postalCode=null,countryCode=CN,countryName=中国,hasLatitude=true, latitude=23.025354,hasLongitude=true,longitude=113.748738,phone=null,url=null,extras=Bundle[mParcelledData.dataSize=92]]";
int startCity = data.indexOf("locality=") + "locality=".length();
int endCity = data.indexOf(",", startCity);
String city = data.substring(startCity, endCity);//获取市
int startPlace = data.indexOf("feature=") + "feature=".length();
int endplace = data.indexOf(",", startPlace);
String place = data.substring(startPlace, endplace);//获取地址
LgqLogutil.e(city+place);

04-24 14:53:27.140 20566-20566/com.tianxin.ttttest E/lgq: onCreate----东莞市健升大厦

4、去空格

s = s.replaceAll("\r|\n", "");

5、替换字符串

String abtest = "123abc";
String result ="";
result = abtest.replace("ab","hhhh");//是"123hhhhc"

6、根据游标截取字符串

String abtest = "123abc";
String result ="";
// result = abtest.substring(3);//="abc
result = abtest.substring(3,4);//="a

7、去空格，替换字符

String str = " hell ，午饭，，晚饭 ";
String str2 = str.replaceAll(" ", "");

Pattern pattern = Pattern.compile("\t|\r|\n|\\s*|\\�");
Matcher matcher = pattern.matcher(src);
dest = matcher.replaceAll("");

8、bundleToString

private static String bundleToString(Bundle bundle) {
   if (bundle == null) {
      return "null";
   }
   final StringBuilder sb = new StringBuilder();
   for (String key: bundle.keySet()) {
      sb.append(key).append("=>").append(bundle.get(key)).append("\n");
   }
   return sb.toString();
}