常用工具类

实体类 转 Map
public static Map<String, Object> convertBeanToMap(Object obj) throws IntrospectionException {
    if (obj == null) {
        return null;
    }
    Map<String, Object> map = new HashMap<String, Object>();
    try {
        BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (PropertyDescriptor property : propertyDescriptors) {
        String key = property.getName();
             // 过滤class属性
            if (!key.equals("class")) {
                 // 得到property对应的getter方法
                    Method getter = property.getReadMethod();
                Object value = getter.invoke(obj);
                if (null == value) {
                    map.put(key, "");
                } else {
                    map.put(key, value);
                }
    }

        }
    } catch (Exception e) {
    }
    return map;
}

根据url获取InpuStream

    public InputStream getFileByUrl(String urlStr) {
        try {
            CloseableHttpClient httpClient = HttpClients.createDefault();
            HttpGet method = new HttpGet(urlStr);
            HttpResponse result = httpClient.execute(method);
            InputStream inputStream = result.getEntity().getContent();
            return inputStream;
        } catch (Exception e) {
            e.printStackTrace();
            log.error("======通过url获取 InputStream 异常===",e);
        }
        return null;
    }

InputStream

body传值

public static String postBody(String urlStr,Map<String, Object> paramMap){
    OutputStreamWriter out = null;
    BufferedReader in = null;
    StringBuilder result = new StringBuilder();
    HttpURLConnection conn = null;
    try{
        URL url = new URL(urlStr);
        conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        //发送POST请求必须设置为true
        conn.setDoOutput(true);
        conn.setDoInput(true);
        //设置连接超时时间和读取超时时间
        conn.setConnectTimeout(30000);
        conn.setReadTimeout(10000);
        conn.setRequestProperty("Content-Type", "application/json");
        conn.setRequestProperty("Accept", "application/json");
        //获取输出流
        out = new OutputStreamWriter(conn.getOutputStream());
        out.write(JSONObject.toJSONString(paramMap));
        out.flush();
        out.close();
        //取得输入流，并使用Reader读取
        if (200 == conn.getResponseCode()){
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
            String line;
            while ((line = in.readLine()) != null){
                result.append(line);
            }
        }else{
            System.out.println("ResponseCode is an error code:" + conn.getResponseCode());
        }
    }catch (Exception e){
        e.printStackTrace();
    }finally {
        try{
            if(out != null){
                out.close();
            }
            if(in != null){
                in.close();
            }
        }catch (IOException ioe){
            ioe.printStackTrace();
        }
    }
    return result.toString();
}

params传值

public static String post(String url, Map<String, String> params) {
    OutputStreamWriter out = null;
    BufferedReader in = null;
    StringBuilder result = new StringBuilder();
    try {
        URL realUrl = new URL(url);
        HttpURLConnection conn =(HttpURLConnection) realUrl.openConnection();
        // 发送POST请求必须设置如下两行
        conn.setDoOutput(true);
        conn.setDoInput(true);
        // POST方法
        conn.setRequestMethod("POST");
        // 设置通用的请求属性
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.connect();
        // 获取URLConnection对象对应的输出流
        out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
        // 发送请求参数
        if (params != null) {
            StringBuilder param = new StringBuilder();
            for (Map.Entry<String, String> entry : params.entrySet()) {
                if(param.length()>0){
                    param.append("&");
                }
                param.append(entry.getKey());
                param.append("=");
                param.append(entry.getValue());
            }
            out.write(param.toString());
        }
        // flush输出流的缓冲
        out.flush();
        // 定义BufferedReader输入流来读取URL的响应
        in = new BufferedReader(
                new InputStreamReader(conn.getInputStream(), "UTF-8"));
        String line;
        while ((line = in.readLine()) != null) {
            result.append(line);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    //使用finally块来关闭输出流、输入流
    finally{
        try{
            if(out!=null){
                out.close();
            }
            if(in!=null){
                in.close();
            }
        }
        catch(IOException ex){
            ex.printStackTrace();
        }
    }
    return result.toString();
}

身份证常用方法

 年级

public static int IdNOToAge(String IdNO) {
    int leh = IdNO.length();
    String dates = "";
    if (leh == 18) {
        dates = IdNO.substring(6, 10);
        SimpleDateFormat df = new SimpleDateFormat("yyyy");
        String year = df.format(new Date());
        int u = Integer.parseInt(year) - Integer.parseInt(dates);
        return u;
    } else {
        dates = IdNO.substring(6, 8);
        return Integer.parseInt(dates);
    }

出生年月

public static String getBirthday(String IDCard) {
    String year  = IDCard.substring(6, 10);
    String month =  IDCard.substring(10,12);
    String day = IDCard.substring(12,14);
    return year + "-" + month + "-" + day;
}

性别

public static String getGender(String IDCard) {
    String sex = "";
    if (StringUtils.isNotBlank(IDCard)) {
        //15位身份证号
        if (IDCard.length() == 15) {
            if (Integer.parseInt(IDCard.substring(14, 15)) % 2 == 0) {
                sex = "1";
            } else {
                sex = "0";
            }
            //18位身份证号
        } else if (IDCard.length() == 18) {
            // 判断性别
            if (Integer.parseInt(IDCard.substring(16).substring(0, 1)) % 2 == 0) {
                sex = "1";
            } else {
                sex = "0";
            }
        }
    }
    return sex;
}