StringBuilder使用append提示String concatenation as argument to 'StringBuilder.append()' call

StringBuilder使用append提示

String concatenation as argument to 'StringBuffer.append()' call 
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Reports String concatenation used as the argument to StringBuffer.append(),StringBuilder.append() orAppendable.append(). Such calls may profitably be turned into chained append calls on the existingStringBuffer/Builder/Appendable,
saving the cost of an extraStringBuffer/Builder allocation.

This inspection ignores compile time evaluated String concatenations, which when converted to chained append calls would only worsen performance.     

其实这个提示是表示方法使用不恰当，因为StringBuffer对象的append方法目的就是做对象拼接用的，里面再通过“+”来拼接就不得当，这是编译器对Java的代码规范。

不过实际操作过程中，如果涉及这类“+”拼接与append混合使用时，处理数据量多的话，还是忽略掉这个提示。