private List
     
       strToListString(String s){        List
      
        list = new ArrayList<>();        String[] split = s.split(",");        for(int i=0;i
      
     

private static String listToString(List
      
        list){        StringBuilder sb=new StringBuilder();        for (int i = 0; i < list.size(); i++) {            if (i != list.size() - 1) {                sb.append(list.get(i) + ",");            }else{                sb.append(list.get(i));            }        }        return sb.toString();    }
      

　　

 

 

spring-beans-xx.xx.jar

package org.springframework.beans;

BeanUtils

public static void copyProperties(Object source, Object target, String... ignoreProperties) throws BeansException {        copyProperties(source, target, (Class)null, ignoreProperties);    }

commons-collections-xx-xx.jar

package org.apache.commons.collections;

CollectionUtils

public static boolean isEmpty(Collection coll) {        return (coll == null || coll.isEmpty());    }

commons-lang-xx-xx.jar

package org.apache.commons.lang;

StringUtils

public static boolean isNotEmpty(String str) {        return !StringUtils.isEmpty(str);    }

public static boolean isEmpty(String str) {        return str == null || str.length() == 0;    }

 异常堆栈信息转字符窜

public static String getErrorInfoFromException(Exception e) {        try {            StringWriter sw = new StringWriter();            PrintWriter pw = new PrintWriter(sw);            e.printStackTrace(pw);            return "\r\n" + sw.toString() + "\r\n";        } catch (Exception e2) {            return "bad getErrorInfoFromException";        }    }

 去空格后是否空字符

private boolean isNotEmptyAfterTrim(String s){        if (StringUtils.isNotEmpty(s)){            if (s.trim().length()!=0){                return true;            }        }        return false;    }

字符窜格式化