1.数据连接池采用c3p0,配置如下
<?xml version="1.0" encoding="UTF-8"?> <c3p0-config> <!--c3p0配置1--> <named-config name="c3p0"> <!-- 连接参数 --> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="jdbcUrl">jdbc:mysql://localhost:3306/manager</property> <property name="user">root</property> <property name="password">root</property> <!-- 连接池参数 --> <property name="idleConnectionTestPeriodInMinutes" value="240"/> <property name="idleMaxAgeInMinutes" value="60"/> <property name="maxConnectionsPerPartition" value="250"/> <property name="minConnectionsPerPartition" value="40"/> <property name="partitionCount" value="2"/> <property name="acquireIncrement" value="10"/> <property name="statementsCacheSize" value="0"/> <property name="releaseHelperThreads" value="5"/> <property name="connectionTimeoutInMs" value="5000"/> </named-config> </c3p0-config>
1.1.获得c3p0数据连接池的数据源
public class ComboPooledDataSourceUtil { //无参构造硬编码(配置这个后无需配置xml) public static DataSource getDataSource() throws PropertyVetoException { ComboPooledDataSource dataSource=new ComboPooledDataSource(); dataSource.setDriverClass("com.mysql.jdbc.Driver"); dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/manager"); dataSource.setUser("root"); dataSource.setPassword("root"); return dataSource; } //xml编码 public static DataSource getDataSourceByxml(){ ComboPooledDataSource cpds=new ComboPooledDataSource("c3p0"); return cpds; } }
2. dao层采用dbutils工具类操作数据库语句
@Override public Integer delmany(Integer[] ids) throws SQLException { String sql = "delete from `grade` where gradeId=?"; int n=0; for (int i = 0; i <ids.length; i++) { n = queryRunner.update(sql, ids[i]); } return n; }
3.jsonresult类,向页面输送json格式数据,用于ajax
public class JsonResult { private int code; private String msg; private Object data; public JsonResult() { super(); } public JsonResult(int code) { this.code = code; } public JsonResult(int code, String msg, Object data) { this.code = code; this.msg = msg; this.data = data; } public JsonResult(int code, Object data) { this.code = code; this.data = data; } public JsonResult(int code, String msg) { this.code = code; this.msg = msg; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } }
3.1实体类
public class Grade implements Serializable { private Integer gradeid; private String gradename; private Integer orderid; public Grade(Integer gradeid, String gradename, Integer orderid) { this.gradeid = gradeid; this.gradename = gradename; this.orderid = orderid; } public Grade() { } public Integer getGradeid() { return gradeid; } public void setGradeid(Integer gradeid) { this.gradeid = gradeid; } public String getGradename() { return gradename; } public void setGradename(String gradename) { this.gradename = gradename; } public Integer getOrderid() { return orderid; } public void setOrderid(Integer orderid) { this.orderid = orderid; } }
4.service层,做业务逻辑
@Override public JsonResult delMnayResult(Integer[] ids) { JsonResult jsonResult = null; try { Integer delmany = gradeDao.delmany(ids); if (delmany>0){ jsonResult = new JsonResult(200); }else { jsonResult = new JsonResult(400); } } catch (SQLException e) { e.printStackTrace(); } return jsonResult; }
5.创建servlet抽象类,避免以后一个请求建一个servlet处理类
public abstract class BaseServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取模块中方法标识符 String action = request.getParameter("action"); if (action == null) { action = "index"; } try { //1:获取类的字节码 Class aClass = this.getClass(); Object o = aClass.newInstance();// 通过类实例化对象 //方法 方法都是定义在类中，找方法 在类中 Method method = aClass.getDeclaredMethod(action, HttpServletRequest.class, HttpServletResponse.class); Object obj = method.invoke(o, request, response); if (obj instanceof String) { //转发 request.getRequestDispatcher(obj.toString()).forward(request, response); } else if (obj instanceof JsonResult) { //json PrintWriter writer = response.getWriter(); JsonResult jsonResult = (JsonResult) obj; String json = JSON.toJSONString(jsonResult); writer.print(json); } } catch (Exception e) { e.printStackTrace(); } finally { } } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } }
5.1.批量删除servlet类
@WebServlet("/main/grade")
public class GradeServlet extends BaseServlet {
GradeService service = new GradeServiceImpl();
//批量删除 public JsonResult delMany(HttpServletRequest request, HttpServletResponse response){ String[]ids=request.getParameterValues("gIDs"); Integer[]delIds=new Integer[ids.length]; for (int i = 0; i < ids.length; i++) { delIds[i]=Integer.parseInt(ids[i]); } JsonResult jsonResult = service.delMnayResult(delIds); return jsonResult; }
}
6. 前端部分代码,此处是列表页面,一般要先做好列表页才能删除,划线代码为预删除勾选按钮
<c:forEach items="${requestScope.grades}" var="grade">
<tr class="text-c">
<td><input type="checkbox" value="${grade.gradeid}" id="gIDs" name="gIDs"></td>
<td id="gid">${grade.gradeid}</td>
<td><u style="cursor:pointer" class="text-primary">${grade.gradename}</u></td>
<td>${grade.orderid}</td>
<td hidden="hidden">13000000000</td>
<td hidden="hidden">[email protected]</td>
<td class="text-l" hidden="hidden">北京市 海淀区</td>
<td hidden="hidden">2014-6-11 11:11:42</td>
<td class="td-status" hidden="hidden"><span class="label label-success radius">已启用</span></td>
<td class="td-manage"><a style="text-decoration:none" onClick="member_stop(this,'10001')" href="javascript:;" title="停用"><i class="Hui-iconfont"></i></a> <a title="编辑" href="javascript:;" onclick="member_edit('编辑','/main/grade?action=gradePage&gradeId=${grade.gradeid}','4','','510')" class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a> <a style="text-decoration:none" class="ml-5" onClick="change_password('修改密码','change-password.html','10001','600','270')" href="javascript:;" title="修改密码"><i class="Hui-iconfont"></i></a> <a title="删除" href="javascript:;" onclick="member_del(${grade.gradeid})" class="ml-5" style="text-decoration:none"><i class="Hui-iconfont"></i></a></td>
</tr>
</c:forEach>
/////代码过多已省略,可在H-UI下载模板
<a href="javascript:;" onclick="datadel()" class="btn btn-danger radius"><i class="Hui-iconfont"></i> 批量删除</a>
6.1 重点
/**批量删除*/ function datadel() { $('input[name="gIDs"]:checked').each( function () { delgra($(this).val(), this) } ); } function delgra(id, dome) { var url="/main/grade?action=delMany"; var obj={ gIDs:id } $.get(url,obj,function (data) { if(data.code=="200"){ layer.msg("删除成功", {time: 1000, icon: 6, shift: 6}); location.href="/main/grade"; }else { layer.msg("删除失败", {time: 1000, icon: 5, shift: 6}); } },"json") }
7.效果图如下:
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