Eclipse 正则表达式 查找与替换

CTRL + space in the textboxes gives you all kinds of suggestions for regular expression writing. 

查找

替换

Be sure to check out the \C regular expression operator, which I think is specific to Eclipse.

It saves a lot of work in replacing the same word in upper-case, lower-case, and camelCase variants.

For example, if the original text is:

SomeObject someObject = SOMEOBJECT;

then doing a "Replace All" replacing 

someObject

 

with 

\CanotherObject

will get you:

AnotherObject anotherObject = ANOTHEROBJECT;

 https://dzone.com/articles/using-regular-expressions

I had an old method with hundreds of lines doing calling a getAttribute("X") and casting the result to a string.

(String)object1.getAttribute("X")
(String)object2.getAttribute("Y")
(String)objectN.getAttribute("Z")

I had to change them all to use a new method that checks if the attribute is null. So the new line would be

getSafeStringAttribute(object1,"X")
getSafeStringAttribute(object2,"Y")
getSafeStringAttribute(objectN,"Z")

With this simple regEx you can do a replace all!

find :

\(String\)(.+)\.getAttribute\("(.+)"\)

replace: 

 

getSafeStringAttribute($1,"$2")

 

The first (.+) will match the objectX part while the second will match the attribute name.

The best thing is that when you select some text and

type CTRL + F (if the Regular Expressions checkbox is ticked)

you string in the find will be already escaped from characters like '(', ')' etc!