2021.11.26 测试——新闻词云图

一、今日学习内容

 利用python对新闻进行分词，获取数据，存入数据库

import jieba
txt = open("all2.csv", "r", encoding='utf-8').read()
words = jieba.lcut(txt)  # 使用精确模式对文本进行分词
counts = {}  # 通过键值对的形式存储词语及其出现的次数

for word in words:
    if len(word) == 1:  # 单个词语不计算在内
        continue
    else:
        counts[word] = counts.get(word, 0) + 1  # 遍历所有词语，每出现一次其对应的值加 1

items = list(counts.items())  # 将键值对转换成列表
items.sort(key=lambda x: x[1], reverse=True)  # 根据词语出现的次数进行从大到小排序

for i in range(5000):
    word, count = items[i]
    import pymysql

    db = pymysql.connect(host="localhost", user="root", password="08301016", database="cloud", charset="utf8mb4")
    cursor = db.cursor()
    sql = "insert into all1(word,count) values ('" + str(word) + "','" + str(
        count) + "')"
    try:
        cursor.execute(sql)
        db.commit()
        # print(school_shengfen + "\t" + school_name + "添加成功")
    # except:
    #     print("插入出错")
    #     db.rollback()
    except pymysql.Error as e:
        print("增加数据失败:  " + str(e))
        db.rollback()

    print("{0:<5}{1:>5}".format(word, count))

通过读取数据库数据，生成词云图

<!DOCTYPE html>
<html>
<head>
    <title>词云图统计</title>
    <meta charset="utf-8">
<!--    <script src="echarts/echarts.min.js"></script>-->
    <script src="echarts/echart3.js"></script>
    <script src="echarts/echarts-wordcloud.js"></script>

    <script src="js/jquery.min.js"></script>
</head>
<body>
<div id="main" style="width: 50%;height: 600px;float: left"></div>
<script>
    var myChart = echarts3.init(document.getElementById('main'));
    var dt;
    var hzb=new Array(0);
    var zzb=new Array(0);
    $.ajax({
        url : "cjCloudServlet",
        async : true,
        type : "post",
        data : {
        },
        dataType : "json",

        success : function(data) {
            dt = data;
            var mydata = new Array(0);
            for (var i = 0; i < dt.length; i++) {
                var d = {};

                d["name"] = dt[i].word;

                d["value"] = dt[i].count;
                mydata.push(d);
                hzb.push(dt[i].word);
                zzb.push(dt[i].count);
            }
            //alert("mydata"+mydata);
            var myChart = echarts3.init(document.getElementById('main'));
            //设置点击效果

            myChart.setOption({
                title: {
                    text: ''
                },
                tooltip: {
                    formatter:function (params){
                        console.log(params);
                        return data.name + " : " +data.value + "次";

                    }
                },
                series: [{
                    type : 'wordCloud',  //类型为字符云
                    shape:'smooth',  //平滑
                    gridSize : 8, //网格尺寸
                    size : ['50%','50%'],
                    //sizeRange : [ 50, 100 ],
                    rotationRange : [-45, 0, 45, 90,60,16], //旋转范围
                    textStyle : {
                        normal : {
                            fontFamily:'微软雅黑',
                            color: function() {
                                return 'rgb(' +
                                    Math.round(Math.random() * 255) +
                                    ', ' + Math.round(Math.random() * 255) +
                                    ', ' + Math.round(Math.random() * 255) + ')'
                            }
                        },
                        emphasis : {
                            shadowBlur : 5,  //阴影距离
                            shadowColor : '#333'  //阴影颜色
                        }
                    },
                    left: 'center',
                    top: 'center',
                    right: null,
                    bottom: null,
                    width:'100%',
                    height:'100%',
                    data:mydata
                }]
            });


        },
        error : function() {
            alert("请求失败");
        },
    });


</script>
</body>

</html>

 

posted @ 2021-11-26 22:56  小仙女W  阅读(69)  评论(0)  编辑  收藏  举报