Mysql数据源提交
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package com.test.common.utils;
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import java.sql.*;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* @author liangdaliang
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* @Description:mysql执行器
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* @date 2025-02-20 17:05
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*/
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public class MySQLExecutor {
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/**
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* 执行 SQL 查询,并将结果转换为 List<Map<String, Object>>
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*
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* @param sql SQL 查询语句(已包含参数值)
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* @param url 数据库 URL
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* @param user 数据库用户名
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* @param password 数据库密码
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* @return 查询结果(每行数据为一个 Map)
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*/
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public static List<Map<String, Object>> executeQuery(String sql, String url, String user, String password) {
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List<Map<String, Object>> result = new ArrayList<>();
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try (Connection connection = DriverManager.getConnection(url, user, password);
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Statement statement = connection.createStatement()) {
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// 执行查询,限制最大100行
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try (ResultSet resultSet = statement.executeQuery(sql + " LIMIT 100")) {
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// 获取结果集的元数据
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ResultSetMetaData metaData = resultSet.getMetaData();
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int columnCount = metaData.getColumnCount();
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// 遍历结果集
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while (resultSet.next()) {
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Map<String, Object> row = new HashMap<>();
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for (int i = 1; i <= columnCount; i++) {
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// 获取字段名和字段值
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String columnName = metaData.getColumnLabel(i);
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Object columnValue = resultSet.getObject(i);
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row.put(columnName, columnValue);
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}
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result.add(row);
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}
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}
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} catch (SQLException e) {
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throw new RuntimeException(e);
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}
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return result;
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}
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}
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