JavaWeb-综合案例(用户信息)-学习笔记04【删除选中功能】

水深无声 2022-10-30 01:21 170阅读 0赞

>  *  **[Java后端 学习路线 笔记汇总表【黑马程序员】][Java_ _]**
> 
> 1.  [JavaWeb-综合案例(用户信息)-学习笔记01【列表查询】][JavaWeb-_-_01]
> 2.  [JavaWeb-综合案例(用户信息)-学习笔记02【登录功能】][JavaWeb-_-_02]
> 3.  [JavaWeb-综合案例(用户信息)-学习笔记03【添加删除修改功能】][JavaWeb-_-_03]
> 4.  [JavaWeb-综合案例(用户信息)-学习笔记04【删除选中功能】][JavaWeb-_-_04]
> 5.  [JavaWeb-综合案例(用户信息)-学习笔记05【分页查询功能】][JavaWeb-_-_05]
> 6.  [JavaWeb-综合案例(用户信息)-学习笔记06【复杂条件查询功能】][JavaWeb-_-_06]

**目录**

第3节 删除选中功能

删除选中功能\_分析

删除选中功能\_代码实现\_获取选中的复选框

删除选中功能\_代码实现\_删除选中用户

DelSelectedServlet.java

其他Java代码

删除选中功能 实现效果

删除选中功能\_代码实现\_删除选中用户\_优化

全选/全不选 按钮的实现

--------------------

# 第3节 删除选中功能 #

## 删除选中功能\_分析 ##

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70][]

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 1][] 删除选中功能

## 删除选中功能\_代码实现\_获取选中的复选框 ##

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 2][]
> 
> ![20210216170227511.png][]

> ![20210216171403556.png][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 3][]

> ![2021021617152975.png][]
> 
> ![2021021617315369.png][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 4][]

## 删除选中功能\_代码实现\_删除选中用户 ##

### DelSelectedServlet.java ###

package cn.itcast.web.servlet;
    
    import cn.itcast.service.UserService;
    import cn.itcast.service.impl.UserServiceImpl;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    @WebServlet("/delSelectedServlet")
    public class DelSelectedServlet extends HttpServlet {
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            //1.获取所有id
            String[] ids = request.getParameterValues("uid");
            //2.调用service删除
            UserService service = new UserServiceImpl();
            service.delSelectedUser(ids);
            //3.跳转查询所有Servlet
            response.sendRedirect(request.getContextPath() + "/userListServlet");
        }
    
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            this.doPost(request, response);
        }
    }

### 其他Java代码 ###

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 5][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 6][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 7][]

### 删除选中功能 实现效果 ###

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 8][]

## 删除选中功能\_代码实现\_删除选中用户\_优化 ##

### 全选/全不选 按钮的实现 ###

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 9][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 10][]
> 
> ![20210216173456282.png][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 11][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 12][]

[Java_ _]: https://blog.csdn.net/weixin_44949135/article/details/113773297
[JavaWeb-_-_01]: https://blog.csdn.net/weixin_44949135/article/details/113823440
[JavaWeb-_-_02]: https://blog.csdn.net/weixin_44949135/article/details/113822709
[JavaWeb-_-_03]: https://blog.csdn.net/weixin_44949135/article/details/113824663
[JavaWeb-_-_04]: https://blog.csdn.net/weixin_44949135/article/details/113826067
[JavaWeb-_-_05]: https://blog.csdn.net/weixin_44949135/article/details/113826657
[JavaWeb-_-_06]: https://blog.csdn.net/weixin_44949135/article/details/113827460
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