StrSubstitutor类 字符替换

StrSubstitutor是一个工具类，它的目的是字符替换

例：

 Map values = new HashMap();
 values.put("animal", "quick brown fox");
 values.put("target", "lazy dog");
 String template = "The ${animal} jumped over the ${target}.";
 StrSubstitutor sub = new StrSubstitutor(values);
 String resolvedString = sub.replace(template);

替换后值：The quick brown fox jumped over the lazy dog.

StrSubstitutor提供取值分隔符 “:-”，添加到变量的后面

例：

Map values = new HashMap();
 values.put("animal", "quick brown fox");
 values.put("target", "lazy dog");
 
 String template = "The ${animal} jumped over the ${target}. ${undefined.number:-1234}.";
 
 StrSubstitutor sub = new StrSubstitutor(values);
 String resolvedString = sub.replace(template)

替换后：The quick brown fox jumped over the lazy dog. 12345670.

自定义匹配符

如果字符串中的变量形式不是 ${}，而是"$()"，StrSubstitutor提供了不同的构造器以及setVariablePrefix(char)，setVariableSuffix(char)等方法自定义匹配符。

Map values = new HashMap();
values.put("animal", "quick brown fox");
values.put("target", "lazy dog");
 
String template = "The &(animal) jumped over the &(target). &(undefined.number:-12345670).";
 
StrSubstitutor sub = new StrSubstitutor(values, "&(", ")", '&');
String resolvedString = sub.replace(template);

替换后：The quick brown fox jumped over the lazy dog. 12345670.