【工具类】字符串处理工具类

去开头的“/”与结尾的“？1234”
应用大小的转换类
转换进度成百分比形式
去除path中开头的“/”
星级转换方法

View Code

  1 import java.text.DecimalFormat;

  2 

  3 public class StringUtil {

  4     /**

  5      * 

  6     * @Title: getAppPath

  7     * @Description: TODO   “/web/webdsfs/sfwe12re.apk?12324”--- 去开头的“/”与结尾的“？1234”

  8     * @param str

  9     * @return

 10      */

 11     public static String getAppPath(String str) {

 12         if(str == null){

 13             return null;

 14         }

 15         if (!str.contains("?") && !str.startsWith("/")) {

 16             return str;

 17         }

 18         int starPosition = 0;

 19         int endPosition;

 20         if (str.startsWith("/")) {

 21             starPosition = 1;

 22         }

 23         if (str.contains("?")) {

 24             endPosition = str.indexOf("?");

 25         } else {

 26             endPosition = str.length();

 27         }

 28         endPosition = str.length();

 29         return str.substring(starPosition, endPosition);

 30     }

 31 

 32     /**

 33      * 

 34      * @Title: getDataSize

 35      * @Description: TODO 每个Item中的应用大小的转换类

 36      * @param size

 37      * @return

 38      */

 39     public static String getDataSize(String sSize) {

 40         if (sSize == null || "".equals(sSize)) {

 41             return " 0 M";

 42         }

 43         long size = Long.parseLong(sSize);

 44         if (size < 0) {

 45             size = 0;

 46         }

 47         DecimalFormat formater = new DecimalFormat("####.00");

 48         if (size < 1024) {

 49             return size + "bytes";

 50         } else if (size < 1024 * 1024) {

 51             float kbsize = size / 1024f;

 52             return formater.format(kbsize) + "KB";

 53         } else if (size < 1024 * 1024 * 1024) {

 54             float mbsize = size / 1024f / 1024f;

 55             return formater.format(mbsize) + "MB";

 56         } else if (size < 1024 * 1024 * 1024 * 1024) {

 57             float gbsize = size / 1024f / 1024f / 1024f;

 58             return formater.format(gbsize) + "GB";

 59         } else {

 60             return " 0 M";

 61         }

 62     }

 63 

 64     /**

 65      * 

 66      * @Title: getProgress

 67      * @Description: TODO 转换进度成百分比形式

 68      * @param current

 69      *            当前下载大小

 70      * @param total

 71      *            当大小

 72      * @return

 73      */

 74     public static String getProgress(int current, int total) {

 75         if (total == 0) {

 76             return 0 + "%";

 77         }

 78         DecimalFormat formater = new DecimalFormat("##0.0");

 79         float kbsize = (float) (current) / (float) total * 100;

 80         if(kbsize > 100f){

 81             kbsize = 100f; 

 82         }

 83         return formater.format(kbsize) + "%";

 84     }

 85 

 86     /**

 87      * 

 88      * @Title: removeSpace

 89      * @Description: TODO 去除path中开头的“/”

 90      * @return

 91      */

 92     public static String removeSpace(String path) {

 93         if (!path.startsWith("/")) {

 94             return path;

 95         }

 96         String address = path.substring(1, path.length());

 97         return address;

 98     }

 99 

100     /**

101      * 星级转换方法

102      * @param star_level

103      * @return

104      */

105     public static String getStar_level(String star_level) {

106         if (star_level == null) {

107             return "0.0";

108         }

109         float star_num = Float.parseFloat(star_level);

110         DecimalFormat formater = new DecimalFormat("#0.0");

111         return formater.format(star_num);

112     }

113 }