mysql獲取數據字典

時間 2019-11-18

標籤 mysql 獲取數據字典欄目 MySQL 简体版

原文原文鏈接

一、sql語句css

<!--查看數據字典 -->
    <select id="queryDbDictionary" parameterType="string"
        resultType="DbDictionary">
        SELECT
        a.TABLE_SCHEMA as tableSchema,
        a.TABLE_NAME as tableName,
        a.COLUMN_NAME as columnName,
        a.ORDINAL_POSITION as ordinalPosition,
        a.COLUMN_DEFAULT as columnDefault,
        a.IS_NULLABLE as isNullable,
        a.COLUMN_TYPE as columnType,
        a.COLUMN_COMMENT as columnComment,
        a.COLUMN_KEY as columnKey,
        a.EXTRA as extra,
        b.TABLE_COMMENT as tableComment
        from information_schema.COLUMNS a
        LEFT JOIN information_schema.TABLES b ON a.TABLE_NAME=b.TABLE_NAME
        where a.TABLE_SCHEMA=#{value}
        ORDER BY b.TABLE_NAME
    </select>

二、實體html

/**
 * 數據字典模型類
 * Created by fuguangli on 2016/12/7.
 */
@Data
@EqualsAndHashCode(callSuper = false)
public class DbDictionary implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = -7536298200802665693L;
    private String tableSchema;       //數據庫名
    private String tableName;         //代表
    private String ordinalPosition;   //序號
    private String columnName;        //字段名
    private String columnType;        //字段類型
    private String columnDefault;     //字段默認
    private String isNullable;        //能否空
    private String extra;             //其餘
    private String columnKey;         //主鍵約束
    private String columnComment;     //字段註釋
    private String tableComment;     //表註釋

}

三、servicejava

@Override
    public Map<String, Object> queryDbDictionary(String tableSchema) {
        List<DbDictionary> dbDictionaries = qyInteriorDao.queryDbDictionary(tableSchema);
        System.err.println(dbDictionaries.toString());
        Map<String, Object> map = null;
        String schema = tableSchema; // 數據庫名稱
        if (dbDictionaries != null && dbDictionaries.size() > 0) {
            map = new HashMap<>();

            List<DbDictionary> columns = null;
            Map<String, List<DbDictionary>> tables = null;
            tables = new TreeMap<>();
            for (DbDictionary db : dbDictionaries) {
                columns = new LinkedList<>();

                String tableName = db.getTableName();
                if (tables.containsKey(tableName)) {
                    tables.get(tableName).add(db);
                } else {
                    columns.add(db);
                    tables.put(tableName, columns);
                }
            }
            map.put("schema", schema);
            map.put("tables", tables);
            System.err.println(map.toString());
            return map;
        }

        return null;
    }

四、jspsql

<%--
  Created by IntelliJ IDEA.
  User: fuguangli
  Date: 2016/12/7
  Time: 11:36
  To change this template use File | Settings | File Templates.
  用於獲取數據字典
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ include file="/base.jsp" %>
<html>
<head>
    <title>${map.schema} 數據字典</title>
    <link href="http://cdn.bootcss.com/twitter-bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <h1 style="text-align:center;">${map.schema} 數據字典</h1>
<c:forEach items="${map.tables}" varStatus="status" var="table">
    <h3>${table.key}&nbsp;&nbsp;&nbsp;備註:${table.value[0].tableComment}</h3>
    <table class="table table-hover table-bordered table-condensed">
        <thead>
        <tr>
            <th>序號</th>
            <th>字段名</th>
            <th>數據類型</th>
            <th>默認值</th>
            <th>容許非空</th>
            <th>其餘選項</th>
            <th>主鍵約束</th>
            <th>備註</th>
        </tr>
        </thead>
        <tbody>
        <c:forEach items="${table.value}" var="columns" varStatus="s2">

            <tr>
                <td>${columns.ordinalPosition}</td>
                <td>${columns.columnName}</td>
                <td>${columns.columnType}</td>
                <td>${columns.columnDefault}</td>
                <td>${columns.isNullable}</td>
                <td>${columns.extra}</td>
                <td>${columns.columnKey}</td>
                <td>${columns.columnComment}</td>
            </tr>
        </c:forEach>


        </tbody>
    </table>

</c:forEach>


</div>
</body>
</html>