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BBS (Bulletin Board System) forum of campus provides a main platform that students from the same university can communicate with each other by posting a post or comment others posts. The posts and comments in campus BBS contain useful information about the students. In this paper, we design and implement a program to collect the emotional data that were generated in the last two months in BBS of Shanghai Jiao Tong University, and analyze the fluctuation of the emotion along with time. Firstly, we implement a simple crawler to fetch the content of posts and comments; secondly, using Chinese lexical analysis system to get the words; then, give each word an emotional tendency (positive or negative) by using lexicon and analyze the result.

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