用javeEE实现淘宝收获地址，单表存储，具有翻页功能，增删改功能

首先，我们需要设计数据库表结构。本例中，我们只使用一张表来存储收货地址信息，表名为`tb_address`，包含以下字段：

- `id`：主键，自增长；
- `user_id`：用户 ID，用于关联用户表；
- `name`：收货人姓名；
- `phone`：收货人电话；
- `province`：省份；
- `city`：城市；
- `district`：区县；
- `address`：详细地址；
- `is_default`：是否默认地址，0 表示不是默认地址，1 表示是默认地址。

接下来，我们可以创建一个 `Address` 类来封装地址信息，并为其编写相应的 Getter 和 Setter 方法。

public class Address {
    private int id;
    private int userId;
    private String name;
    private String phone;
    private String province;
    private String city;
    private String district;
    private String address;
    private int isDefault;
 
    // Getter 和 Setter 方法省略
}

接着，我们可以创建一个 `AddressDao` 类来实现对地址表的增删改查操作。在本例中，我们使用 JDBC 连接数据库来实现数据访问。

public class AddressDao {
    // 数据库连接信息
    private String driver = "com.mysql.jdbc.Driver";
    private String url = "jdbc:mysql://localhost:3306/test";
    private String username = "root";
    private String password = "123456";
    
    // 查询地址列表
    public List<Address> getAddressList(int userId, int page, int pageSize) throws Exception {
        // 计算分页参数
        int start = (page - 1) * pageSize;
        int end = start + pageSize;
        
        // 创建数据库连接
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        
        // 执行 SQL 查询
        String sql = "SELECT * FROM tb_address WHERE user_id = ? LIMIT ?, ?";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setInt(1, userId);
        pstmt.setInt(2, start);
        pstmt.setInt(3, pageSize);
        ResultSet rs = pstmt.executeQuery();
        
        // 封装查询结果
        List<Address> list = new ArrayList<>();
        while (rs.next()) {
            Address address = new Address();
            address.setId(rs.getInt("id"));
            address.setUserId(rs.getInt("user_id"));
            address.setName(rs.getString("name"));
            address.setPhone(rs.getString("phone"));
            address.setProvince(rs.getString("province"));
            address.setCity(rs.getString("city"));
            address.setDistrict(rs.getString("district"));
            address.setAddress(rs.getString("address"));
            address.setIsDefault(rs.getInt("is_default"));
            list.add(address);
        }
        
        // 关闭连接
        rs.close();
        pstmt.close();
        conn.close();
        
        return list;
    }
    
    // 查询地址总数
    public int getAddressCount(int userId) throws Exception {
        // 创建数据库连接
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        
        // 执行 SQL 查询
        String sql = "SELECT COUNT(*) FROM tb_address WHERE user_id = ?";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setInt(1, userId);
        ResultSet rs = pstmt.executeQuery();
        
        // 获取查询结果
        int count = 0;
        if (rs.next()) {
            count = rs.getInt(1);
        }
        
        // 关闭连接
        rs.close();
        pstmt.close();
        conn.close();
        
        return count;
    }
    
    // 添加地址
    public void addAddress(Address address) throws Exception {
        // 创建数据库连接
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        
        // 执行 SQL 插入语句
        String sql = "INSERT INTO tb_address(user_id, name, phone, province, city, district, address, is_default) " +
                     "VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setInt(1, address.getUserId());
        pstmt.setString(2, address.getName());
        pstmt.setString(3, address.getPhone());
        pstmt.setString(4, address.getProvince());
        pstmt.setString(5, address.getCity());
        pstmt.setString(6, address.getDistrict());
        pstmt.setString(7, address.getAddress());
        pstmt.setInt(8, address.getIsDefault());
        pstmt.executeUpdate();
        
        // 关闭连接
        pstmt.close();
        conn.close();
    }
    
    // 更新地址
    public void updateAddress(Address address) throws Exception {
        // 创建数据库连接
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        
        // 执行 SQL 更新语句
        String sql = "UPDATE tb_address SET name = ?, phone = ?, province = ?, city = ?, district = ?, " +
                     "address = ?, is_default = ? WHERE id = ?";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setString(1, address.getName());
        pstmt.setString(2, address.getPhone());
        pstmt.setString(3, address.getProvince());
        pstmt.setString(4, address.getCity());
        pstmt.setString(5, address.getDistrict());
        pstmt.setString(6, address.getAddress());
        pstmt.setInt(7, address.getIsDefault());
        pstmt.setInt(8, address.getId());
        pstmt.executeUpdate();
        
        // 关闭连接
        pstmt.close();
        conn.close();
    }
    
    // 删除地址
    public void deleteAddress(int id) throws Exception {
        // 创建数据库连接
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        
        // 执行 SQL 删除语句
        String sql = "DELETE FROM tb_address WHERE id = ?";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setInt(1, id);
        pstmt.executeUpdate();
        
        // 关闭连接
        pstmt.close();
        conn.close();
    }
}

最后，我们可以创建一个 `AddressServlet` 类来处理收货地址相关的 HTTP 请求。

public class AddressServlet extends HttpServlet {
    private AddressDao addressDao = new AddressDao();
    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 获取用户 ID 参数
        int userId = Integer.parseInt(req.getParameter("userId"));
        
        // 获取分页参数
        int page = req.getParameter("page") != null ? Integer.parseInt(req.getParameter("page")) : 1;
        int pageSize = req.getParameter("pageSize") != null ? Integer.parseInt(req.getParameter("pageSize")) : 10;
        
        try {
            // 查询地址列表
            List<Address> list = addressDao.getAddressList(userId, page, pageSize);
            
            // 查询地址总数
            int count = addressDao.getAddressCount(userId);
            
            // 计算总页数
            int pageCount = count % pageSize == 0 ? count / pageSize : count / pageSize + 1;
            
            // 封装查询结果
            Map<String, Object> result = new HashMap<>();
            result.put("code", 200);
            result.put("message", "success");
            result.put("data", list);
            result.put("count", count);
            result.put("pageCount", pageCount);
            
            // 将查询结果转换成 JSON 格式并输出到客户端
            Gson gson = new Gson();
            String json = gson.toJson(result);
            resp.getWriter().write(json);
        } catch (Exception e) {
            e.printStackTrace();
            
            // 封装错误信息并输出到客户端
            Map<String, Object> result = new HashMap<>();
            result.put("code", 500);
            result.put("message", "server error: " + e.getMessage());
            Gson gson = new Gson();
            String json = gson.toJson(result);
            resp.getWriter().write(json);
        }
    }
    
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 获取操作参数
        String action = req.getParameter("action");
        
        try {
            if ("add".equals(action)) {
                // 添加地址
                Address address = new Address();
                address.setUserId(Integer.parseInt(req.getParameter("userId")));
                address.setName(req.getParameter("name"));
                address.setPhone(req.getParameter("phone"));
                address.setProvince(req.getParameter("province"));
                address.setCity(req.getParameter("city"));
                address.setDistrict(req.getParameter("district"));
                address.setAddress(req.getParameter("address"));
                address.setIsDefault(Integer.parseInt(req.getParameter("isDefault")));
                addressDao.addAddress(address);
                
                // 封装添加结果并输出到客户端
                Map<String, Object> result = new HashMap<>();
                result.put("code", 200);
                result.put("message", "success");
                Gson gson = new Gson();
                String json = gson.toJson(result);
                resp.getWriter().write(json);
            } else if ("update".equals(action)) {
                // 更新地址
                Address address = new Address();
                address.setId(Integer.parseInt(req.getParameter("id")));
                address.setName(req.getParameter("name"));
                address.setPhone(req.getParameter("phone"));
                address.setProvince(req.getParameter("province"));
                address.setCity(req.getParameter("city"));
                address.setDistrict(req.getParameter("district"));
                address.setAddress(req.getParameter("address"));
                address.setIsDefault(Integer.parseInt(req.getParameter("isDefault")));
                addressDao.updateAddress(address);
                
                // 封装更新结果并输出到客户端
                Map<String, Object> result = new HashMap<>();
                result.put("code", 200);
                result.put("message", "success");
                Gson gson = new Gson();
                String json = gson.toJson(result);
                resp.getWriter().write(json);
            } else if ("delete".equals(action)) {
                // 删除地址
                int id = Integer.parseInt(req.getParameter("id"));
                addressDao.deleteAddress(id);
                
                // 封装删除结果并输出到客户端
                Map<String, Object> result = new HashMap<>();
                result.put("code", 200);
                result.put("message", "success");
                Gson gson = new Gson();
                String json = gson.toJson(result);
                resp.getWriter().write(json);
            }
        } catch (Exception e) {
            e.printStackTrace();
            
            // 封装错误信息并输出到客户端
            Map<String, Object> result = new HashMap<>();
            result.put("code", 500);
            result.put("message", "server error: " + e.getMessage());
            Gson gson = new Gson();
            String json = gson.toJson(result);
            resp.getWriter().write(json);
        }
    }
}

最后，我们需要在 `web.xml` 文件中配置 `AddressServlet` 类的映射关系。

<servlet>
    <servlet-name>AddressServlet</servlet-name>
    <servlet-class>com.example.AddressServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>AddressServlet</servlet-name>
    <url-pattern>/address/*</url-pattern>
</servlet-mapping>

现在，我们可以在浏览器中访问以下地址来测试代码：

- 查询地址列表：`http://localhost:8080/address?userId=1&page=1&pageSize=10`
- 添加地址：`http://localhost:8080/address?action=add&userId=1&name=张三&phone=13800138000&province=广东省&city=深圳市&district=福田区&address=华强北&isDefault=0`
- 更新地址：`http://localhost:8080/address?action=update&id=1&name=李四&phone=13800138111&province=广东省&city=深圳市&district=南山区&address=科技园&isDefault=1`
- 删除地址：`http://localhost:8080/address?action=delete&id=1`