项目需要实现动态列的报表
用到的jar有：
pdf中文乱码解决：
Font font =new Font(28,"ColonnaMT","/fonts/COLONNA.TTF",Font.PDF_ENCODING_Identity_H_Unicode_with_horizontal_writing,
true);
Font font1 = new Font(28,"体","STSongLight",Font.PDF_ENCODING_UniGB_UCS2_H_Chinese_Simplified,true);