推荐回答（2个）
胸有成竹的主人公是北宋画家文与可。故事出自北宋苏轼《文与可画筼筜谷偃竹记》。“胸有成竹”，比喻做事之前已作好充分准备，对事情的成功已有了十分的把握;又比喻遇事不慌，十分沉着。
胸有成竹的主要人物 文同
胸有成竹 [xiōng yǒu chéng zhú]
基本释义
原指画竹子要在心里有一幅竹子的形象。后比喻在做事之前已经拿定主意。
出 处
宋·苏轼《文与可画筼筜谷偃竹记》：“故画竹；必先得成竹于胸中；执笔熟视；乃见其所欲画者；急起从之；振笔直遂；以追其所见；如兔起鹘落；少纵即逝矣。”
典 故
北宋时候，有一个著名的画家，名叫文同，他是当时画竹子的高手。
文同为了画好竹子，不管是春夏秋冬，也不管是刮风下雨，或是天晴天阴，他都常年不断地在竹林子里头钻来钻去。三伏天气，日头像一团火，烤得地面发烫。可是文同照样跑到竹林子对着太阳的那一面，站在烤人的阳光底下，全神贯注地观察竹子的变化。他一会儿用手指头量一量竹子的节把有多长，一会儿又记一记竹叶子有多密。汗水湿透了他的衣衫，满脸都流着汗，可是他连用手抹也没抹一下，就跟没事儿似的。
有一回，天空刮起了一阵狂风。接着，电闪雷鸣，眼看着一场暴雨就要来临。人们都纷纷往家跑。可就在这时候，坐在家里的文同，急急忙忙抓过一顶草帽，往头上一扣，直往山上的竹林子里奔去。他刚走出大门，大雨就跟用脸盆泼水似地下开了。
文同一心要看风雨当中的竹子，哪里还顾得上雨急路滑！他撩起袍襟，爬上山坡，奔向竹林。他气喘吁吁地跑进竹林，没顾上抹一下流到脸上的雨水，就两眼一眨不眨地观察起竹子来了。只见竹子在风雨的吹打下，弯腰点头，摇来晃去。文同细心地把竹子受风雨吹打的姿态记在心头。
由于文同长年累月地对竹子作了细微的观察和研究，竹子在春夏秋冬四季的形状有什么变化；在阴晴雨雪天，竹子的颜色、姿势又有什么两样；在强烈的阳光照耀下和在明净的月光映照下，竹子又有什么不同；不同的竹子，又有哪些不同的样子，他都摸得一清二楚。所以画起竹子来，根本用不着画草图。
有个名叫晁补之的人，称赞文同说：文同画竹，早已胸有成竹了。
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