基于移动平台的毕业设计选题管理系统（Spring+SpringMVC+MybatisPlus）.zip

package com.sise.common; import java.beans.PropertyDescriptor; import java.lang.reflect.Field; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Collection; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class Converts { public static final String EMPTY = ""; public static final SimpleDateFormat DATE_FORMAT; public static final SimpleDateFormat DATETIME_FORMAT; public static final String DATE_PATTERN = "^\\d{4}-\\d{2}-\\d{2}$"; public static final String DATETIME_PATTERN = "^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\{2}$"; static{ DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd"); DATETIME_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } /** * 除去字符串最后一个 , */ public static String sub(String s){ return s.substring(0,s.length()-1); } public static String sub(String s,int beginIndex){ return s.substring(beginIndex); } public static String sub(String s,int beginIndex,int endIndex){ return s.substring(beginIndex, endIndex); } /** * 集合除首尾 '[' ']' */ public static String sub(Collection<?> col){ return join(col,","); } // Integer 转换 //------------------------------------------------------ public static Integer I(Object o){ return I(o, null); } public static Integer I(Object o,Integer defaultVal){ if(o == null){ return defaultVal; } if(o instanceof Number){ return ((Number)o).intValue(); } return Integer.valueOf((String)o); } // Long　转换 //------------------------------------------------------ public static Long L(Object o){ return L(o, null); } public static Long L(Object o,Long defaultVal){ if(o == null){ return defaultVal; } if(o instanceof Number){ return ((Number)o).longValue(); } return Long.valueOf((String)o); } // Float　转换 //------------------------------------------------------ public static Float F(Object o){ return F(o, null); } public static Float F(Object o,Float defaultVal){ if(o == null){ return defaultVal; } if(o instanceof Number){ return ((Number)o).floatValue(); } return Float.valueOf((String)o); } // Double 转换 //------------------------------------------------------ public static Double D(Object o){ return D(o, null); } public static Double D(Object o,Double defaultVal){ if(o == null){ return defaultVal; } if(o instanceof Number){ return ((Number)o).doubleValue(); } return Double.valueOf((String)o); } // Character 转换 String //------------------------------------------------------ public static String C(Object o){ return o!=null ? o.toString(): null ; } public static String C(Object o,String defaultVal){ return o!=null ? o.toString(): defaultVal ; } public static String S(Object o){ return o!=null ? o.toString(): null ; } public static String S(Object o,String defaultVal){ return o!=null ? o.toString(): defaultVal ; } public static int parseInt(String s){ return Integer.parseInt(s); } public static long parseLong(String s){ return Long.parseLong(s); } public static float parseFloat(String s){ return Float.parseFloat(s); } public static double parseDouble(String s){ return Double.parseDouble(s); } // String 转 Date //------------------------------------------------------ public static synchronized Date parsetDate(String s) throws ParseException{ try { return DATE_FORMAT.parse(s); } catch (ParseException e) { throw e; } } public static synchronized Date parsetDateTime(String s) throws ParseException{ try { return DATETIME_FORMAT.parse(s); } catch (ParseException e) { throw e; } } // Date 转 String //------------------------------------------------------ public static String format(Date date,String pattern){ return new SimpleDateFormat(pattern).format(date); } public static synchronized String dateFormat(Date date){ return DATE_FORMAT.format(date); } public static synchronized String dateTimeFormat(Date date){ return DATETIME_FORMAT.format(date); } // 集合,数组转换为字符串,自定设置分隔符 //------------------------------------------------------ /** * <p>Joins the elements of the provided array into a single String * containing the provided list of elements.</p> * * <p>No separator is added to the joined String. * Null objects or empty strings within the array are represented by * empty strings.</p> * * <pre> * StringUtils.join(null) = null * StringUtils.join([]) = "" * StringUtils.join([null]) = "" * StringUtils.join(["a", "b", "c"]) = "abc" * StringUtils.join([null, "", "a"]) = "a" * </pre> * * @param array the array of values to join together, may be null * @return the joined String, <code>null</code> if null array input * @since 2.0 */ public static String join(Object[] array) { return join(array, null); } /** * <p>Joins the elements of the provided array into a single String * containing the provided list of elements.</p> * * <p>No delimiter is added before or after the list. * Null objects or empty strings within the array are represented by * empty strings.</p> * * <pre> * StringUtils.join(null, *) = null * StringUtils.join([], *) = "" * StringUtils.join([null], *) = "" * StringUtils.join(["a", "b", "c"], ';') = "a;b;c" * StringUtils.join(["a", "b", "c"], null) = "abc" * StringUtils.join([null, "", "a"], ';') = ";;a" * </pre> * * @param array the array of values to join together, may be null * @param separator the separator character to use * @return the joined String, <code>null</code> if null array input * @since 2.0 */ public static String join(Object[] array, char separator) { if (array == null) { return null; } return join(array, separator, 0, array.length); } /** * <p>Joins the elements of the provided array into a single String * containing the provided list of elements.</p> * * <p>No delimiter is added before or after the list. * Null objects or empty strings within the array are represented by * empty strings.</p> * * <pre> * StringUtils.join(null, *) = null * StringUtils.join([], *) = "" * StringUtils.join([null], *) = "" * StringUtils.join(["a", "b", "c"], ';') = "a;b;c" * StringUtils.join(["a", "b", "c"], null) = "abc" * StringUtils.join([null, "", "a"], ';') = ";;a" * </pre> * * @param array the array of values to join together, may be null * @param separator the separator character to use * @param startIndex the first index to start joining from. It is * an error to pass in an end index past the end of the array * @param endIndex the index to stop joining from (exclusive). It is * an error to pass in an end index past the end of the array * @return the joined String, <code>null</code> if null array input * @since 2.0 */ public static String join(Object[] array, char separator, int startIndex, int endIndex) { if (array == null) { return null; } int bufSize = (endIndex - startIndex); if (bufSize <= 0) { return EMPTY; } bufSize *= ((array[startIndex] == null ? 16 : array[startIndex].toString().length()) + 1); StringBuffer