如何在eclipse中用新内容替换搜索到的行？

Question

I am working on a big project which has thousand of Java Files. What i have to do is replace all the System.out.println("Argument") lines used in the code with log4j logging.I can find the line which uses System.out.println(...) by following regex System\\.out.*; . is there a way to replace the println call with

LGR.info( LGR.isInfoEnabled() ? "Argument": null);

This is how it should look:

Before:

System.out.println("Argument")

After:

LGR.info( LGR.isInfoEnabled() ? "Argument": null);

Answer 1

You can use File search:

• Check Case sensitive and Regular expression
• Containing text: System\\.out\\.println\\((.+)\\);
• File name patterns: *.java
• Click Replace...
• Check Regular expression
• With: LGR.info( LGR.isInfoEnabled() ? \\1 : null);

Answer 2

If you right-click on a search result in the Search view, there is an option called Replace All ... . A dialog opens that allows you to enter the replacement text. If a regular expression was used during the search, it also allows to use matcher groups from the regex in the replacement.

There is also an option Replace selected ... if you don't want to replace all occurences.

Answer 3

I think that this should work using search tool (CTRL+F) or File Search (CTRL+H)

search: (System\.out\.println\((.+)\));
replace: LGR.info( LGR.isInfoEnabled() ? $2: null);