身份证转换

src/main/java/com/winhc/bigdata/udf/id_trans.java

@@ -0,0 +1,112 @@
+package com.winhc.bigdata.udf;
+
+import com.aliyun.odps.udf.UDF;
+import com.aliyun.odps.utils.StringUtils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * @Author: π
+ * @Description: 身份证15转18位
+ */
+public class id_trans extends UDF {
+
+    public String evaluate(String id) {
+        if (StringUtils.isBlank(id)) {
+            return null;
+        }
+        if (isNumeric(id.substring(0,id.length() - 1))) {
+            if (id.length() == 18) {
+                return id;
+            } else if (id.length() == 15) {
+                return trans15bitTo18bit(id);
+            }
+        }
+        return null;
+    }
+
+    public static String trans15bitTo18bit(String in) {
+
+        try {
+
+            String[] input = in.split("", -1);
+            String[] result = new String[18];
+            for (int i = 0; i < input.length; i++) {
+                if (i <= 5) {
+                    result[i] = input[i];
+                } else {
+                    result[i + 2] = input[i];
+                }
+            }
+            result[6] = "1";
+            result[7] = "9";
+            //计算最后一位(前十七位乘以系数)
+            String[] xs = {"7", "9", "10", "5", "8", "4", "2", "1", "6", "3", "7", "9", "10", "5", "8", "4", "2"};
+            int sum = 0;
+            for (int i = 0; i < 17; i++) {
+                sum += Integer.valueOf(result[i]) * Integer.valueOf(xs[i]);
+            }
+            //对11求余，的余数 0 - 10
+            int rod = sum % 11;
+            //所得余数映射到对应数字即可
+            if (rod == 0) {
+                result[17] = "1";
+            } else if (rod == 1) {
+                result[17] = "0";
+            } else if (rod == 2) {
+                result[17] = "X";
+            } else if (rod == 3) {
+                result[17] = "9";
+            } else if (rod == 4) {
+                result[17] = "8";
+            } else if (rod == 5) {
+                result[17] = "7";
+            } else if (rod == 6) {
+                result[17] = "6";
+            } else if (rod == 7) {
+                result[17] = "5";
+            } else if (rod == 8) {
+                result[17] = "4";
+            } else if (rod == 9) {
+                result[17] = "3";
+            } else if (rod == 10) {
+                result[17] = "2";
+            }
+
+            StringBuilder sb = new StringBuilder();
+            for (String c : result) {
+                sb.append(c);
+            }
+            return sb.toString();
+        } catch (Exception e) {
+            return null;
+        }
+
+    }
+
+    /**
+     * 利用正则表达式判断字符串是否是数字
+     *
+     * @param str
+     * @return
+     */
+    public static boolean isNumeric(String str) {
+        Pattern pattern = Pattern.compile("[0-9]*");
+        Matcher isNum = pattern.matcher(str);
+        if (!isNum.matches()) {
+            return false;
+        }
+        return true;
+    }
+
+    public static void main(String[] args) {
+        String id = "5101025409306126";
+        System.out.println(isNumeric(id));
+        id_trans n = new id_trans();
+        System.out.println(n.evaluate(id));
+    }
+
+}
+
+