从源码分析StringUtils包

今天用到StringUtils.join方法,闲来无聊,看了下源码

当然不可能自己分析,你傻啊,在这里推荐一个别人分析的;

http://blog.csdn.net/baidu_31071595/article/details/51320622

首先导包

import org.apache.commons.lang3.StringUtils;

我在这里调用的是StringUtils.join方法

public static String join(Object[] array, char separator)
 
把数组中的元素连接成一个字符串返回，把分隔符separator也加上。
 
举例(*表示任意)：
 
StringUtils.join(null, *)                        = null
 
StringUtils.join({}, *)                          = ""
 
StringUtils.join({null}, *)                      = ""
 
StringUtils.join({"as","df","gh","jk"},' '))     = "as df gh jk"
 
StringUtils.join({"as","df","gh","jk"},'.'))     = "as.df.gh.jk"
 
StringUtils.join({"as","","df","gh"},'.'))       = "as..df.gh"
 
StringUtils.join({"","as","","","df","",""},','))= ",as,,,df,,"
 
StringUtils.join({"","as","","","df","",""},' '))= " as   df "
 
StringUtils.join({"as.df.gh"},'.'))                 = "as.df.gh"
 
StringUtils.join({"as.df.gh"},' '))              = "as.df.gh"

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