商品的删除

删除单个商品

DeleteProductByIdServlet:

public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            //接收pid
            String pid = request.getParameter("pid");
            ProductService productService = new ProductService();
            productService.deleteById(pid);

            //页面跳转
            request.getRequestDispatcher("/ProductFindAllServlet").forward(request, response);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

ProductServlet:

/**
     * 删除单条数据
     * @param pid
     * @throws SQLException
     */
    public void deleteById(String pid) throws SQLException {
        ProductDao productDao = new ProductDao();
        productDao.deleteById(pid);
    }

ProductDao:

/**
     * 删除一条数据
     * @param pid
     * @throws SQLException 
     */
    public void deleteById(String pid) throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0JDBCUtils.getDataSource());
        String sql = "delete from product where pid = ?";
        queryRunner.update(sql, pid);
    }

JS:

function deleteById(pid) {      
            var flag = window.confirm("壮士，确定要搞我吗？") 
            if(flag == true) {
                window.location.href="${ pageContext.request.contextPath }/DeleteProductByIdServlet?pid="+pid;
            }
        }   

---

利用复选框删除多条数据

DeleteAllProductServlet:

public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //获取被选中的复选框的id值
        String[] ids = request.getParameterValues("ids");
        //调用业务层处理数据
        ProductService productService = new ProductService();
        productService.deleteAll(ids);

        request.getRequestDispatcher("/ProductFindAllServlet").forward(request, response);
    }

ProductService:

/**
     * 删除所有数据,采用事务处理方式
     * @param ids
     */
    public void deleteAll(String[] ids) {
        Connection conn = null;
        try {
            ProductDao productDao = new ProductDao();
            conn = C3P0JDBCUtils.getConnection();
            conn.setAutoCommit(false);
            for (String id : ids) {
                productDao.deleteAll(conn,id);
            }
            DbUtils.commitAndCloseQuietly(conn);
        } catch (SQLException e) {
            DbUtils.rollbackAndCloseQuietly(conn);
            e.printStackTrace();
        } finally {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

ProductDao:

/**
     * 删除所有数据
     * @param conn
     * @param id
     * @throws SQLException 
     */
    public void deleteAll(Connection conn, String id) throws SQLException {
        //不用获取连接，业务层已获取
        QueryRunner queryRunner = new QueryRunner();
        String sql = "delete from product where pid = ?";
        queryRunner.update(conn, sql, id);
    }

JS:

        //复选框全选
        $(function(){
            $("#selectAll").click(function() {
                $("input[id='ids']").prop("checked",this.checked);
            });
        });

        //点击全部删除提交表单
        function deleteAllProduct() {
            document.getElementById("form1").submit();
        }