利用Java技术优化数据库搜索性能的成功案例分析

// 创建全文索引
CREATE FULLTEXT INDEX idx_product_name ON product (name);

// 创建前缀索引
CREATE INDEX idx_product_name ON product (name(10));

// 批量查询商品信息
List<Product> products = new ArrayList<>();
try (Connection connection = DriverManager.getConnection(url, username, password);
     Statement statement = connection.createStatement();
     ResultSet resultSet = statement.executeQuery("SELECT * FROM product WHERE ...")) {
    while (resultSet.next()) {
        Product product = new Product(resultSet.getInt("id"),
                                      resultSet.getString("name"),
                                      resultSet.getString("description"),
                                      resultSet.getDouble("price"));
        products.add(product);
    }
}

// 在内存中搜索和排序商品
List<Product> searchResults = new ArrayList<>();
for (Product product : products) {
    if (product.getName().contains(keyword)) {
        searchResults.add(product);
    }
}
searchResults.sort(Comparator.comparing(Product::getPrice));

// 使用缓存搜索商品
List<Product> searchResults = cache.get(keyword);
if (searchResults == null) {
    searchResults = new ArrayList<>();
    for (Product product : products) {
        if (product.getName().contains(keyword)) {
            searchResults.add(product);
        }
    }
    searchResults.sort(Comparator.comparing(Product::getPrice));
    cache.put(keyword, searchResults);
}

// 分页搜索商品
int pageSize = 10;
int pageNum = 1;
int startIndex = (pageNum - 1) * pageSize;
int endIndex = pageNum * pageSize;
List<Product> searchResults = searchResults.subList(startIndex, endIndex);