提取某一段div标签之间内容的正则表达式怎么写

public static void main(String[] args) {
String source="

";
StringBuilder result=new StringBuilder();
System.out.println("=======开始匹配文字内容========");
String patternStrs="()";
Pattern pattern=Pattern.compile(patternStrs);
Matcher matcher=pattern.matcher(source);
while(matcher.find()){
result.append(matcher.group(2)+"\n");
}
System.out.println(result.toString());

System.out.println("=======开始匹配name属性值========");
String patternName="()";
pattern=Pattern.compile(patternName);
matcher=pattern.matcher(source);
result=result.delete(0, result.length());
while(matcher.find()){
result.append(matcher.group(2)+"\n");
}
System.out.println(result.toString());
} $txt="< div id=\"etcTrans\" class=\"trans-container tab-content\">

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