String快速换成StringBuilder

快速换成StringBuilder

将String的"+"变成StringBuilder.append()

// 变换前
String path = "/" + subDir + "/";
// 变换后
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("/");
stringBuilder.append(subDir );
stringBuilder.append("/");

鼠标选中要变为StringBuilder的字符串变量，然后按“CTRL + 1(数字1)，见下图