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一直以来，就想让我的vim支持java的自动补全，结果老是补不全，就是没有安装齐全。自动补全我总是喜欢到网上东找找，西找找，可是感觉都不对路。本来不想搞了的，今天就想，为何不到官网上去试试。结果，果然是成功了的。。。。

下面是官网的安装指南：

install details

1. Unzip javacomplete.zip to a directory of 'runtimepath', e.g.

$HOME/.vim (unix/linux), $VIM/vimfiles (windows).

> unzip javacomplete.zip -d ~/.vim

To update Vim help tags, run vim and run command:

:helptags $HOME/.vim/doc

or

:helptags $VIM/vimfiles/doc

NOTE: javacomplete.vim, java_parser.vim and Reflection.java should be in one

autoload directory of 'runtimepath'.

javacomplete.txt should be in one doc directory of 'runtimepath'.

2. Set 'omnifunc' option. e.g.

:setlocal omnifunc=javacomplete#Complete

Or, use autocmd:

:" Only do this part when compiled with support for autocommands.

:if has("autocmd")

: autocmd Filetype java setlocal omnifunc=javacomplete#Complete

:endif

You can add this command to your .vimrc or _vimrc.

3. Set 'completefunc' option to show parameters information IF YOU LIKE. e.g.

:setlocal completefunc=javacomplete#CompleteParamsInfo

You can map as follows for better display:

:inoremap <buffer> <C-X><C-U> <C-X><C-U><C-P>

:inoremap <buffer> <C-S-Space> <C-X><C-U><C-P>

4. Reflection.java will be automatcally compiled and placed to $HOME when you

use first time. Assure that Reflection.java is in the same directory with

javacomplete.vim to be searched in autoload subdirectory of &rtp.

If no Reflection.class is generated, check that you have the write permission

in $HOME directory.

If a previous Reflection.java is not compatible with the new version

javacomplete.vim, please compile Reflection.java manually.

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