android开发 服务器端访问MySQL数据库，并把数据库中的某张表解析成xml格式输出到浏览器

我们此时只要写一个Servlet就可以了：

public class UpdateMenuServlet extends HttpServlet {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    // 构造方法
    public UpdateMenuServlet() {
        super();
    }
    // 销毁方法
    public void destroy() {
        super.destroy();
    }
    // 响应Get请求
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/xml");
        PrintWriter out = response.getWriter();
        // 实例化dao
        UpdateDao dao = new UpdateDaoImpl();
        // 获得菜谱列表
        List<Menu> list = dao.getMenuList();
        
        // 拼XML格式数据
        out.println("<?xml version='1.0' encoding='UTF-8'?>");
        // 根节点
        out.println("<menulist>");
            for (int i = 0; i <list.size(); i++) {
                Menu m = list.get(i);
                out.println("<menu>");
                    // 菜谱编号
                    out.print("<id>");
                        out.print(m.getId());
                    out.println("</id>");
                    // 分类
                    out.print("<typeId>");
                        out.print(m.getTypeId());
                    out.println("</typeId>");
                    // 名称
                    out.print("<name>");
                        out.print(m.getName());
                    out.println("</name>");
                    // 图片路径
                    out.print("<pic>");
                        out.print(m.getPic());
                    out.println("</pic>");
                    // 价格
                    out.print("<price>");
                        out.print(m.getPrice());
                    out.println("</price>");
                    // 备注
                    out.print("<remark>");
                        out.print(m.getRemark());
                    out.println("</remark>");
                    
                out.println("</menu>");
            }
        out.println("</menulist>");
        out.flush();
        out.close();
    }
    // 响应Post请求
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request,response);
    }
    // 初始化方法
    public void init() throws ServletException {
    }
}

然后就是直接在浏览器中输入这个Servlet的具体网址就可以了：

  <?xml version="1.0" encoding="UTF-8" ?> 
- <menulist>
- <menu>
  <id>1</id> 
  <typeId>1</typeId> 
  <name>水煮鱼</name> 
  <pic>test</pic> 
  <price>20</price> 
  <remark>test</remark> 
  </menu>
- <menu>
  <id>2</id> 
  <typeId>2</typeId> 
  <name>凉拌西红柿</name> 
  <pic>tets</pic> 
  <price>10</price> 
  <remark>test</remark> 
  </menu>
- <menu>
  <id>3</id> 
  <typeId>3</typeId> 
  <name>tofu</name> 
  <pic>test</pic> 
  <price>8</price> 
  <remark>test</remark> 
  </menu>
  </menulist>