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How to delete information in javascript: first add a field in front of each piece of data; then click the batch delete button to jump to the batchDelete() method; and finally create the background processing code.
The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to delete information with javascript?
JS Ajax batch deletion of data information
Batch deletion of data information is already a very common functional requirement. The following is a JS Ajax submission to the background for data processing A small example of deletion:
First add a field in front of each piece of data to display a check box. The code is as follows:
<input type="checkbox" name="userCheck" value="${user.id}" />
Click the batch delete button to jump to batchDelete() Method: The code is as follows:
function batchDelete(){ //判断至少选择了一项 var checkedNum = $("input[name='userCheck']:checked").length; if (checkedNum == 0) { alert("至少选择一项删除!"); return; } if (confirm("确定删除选中的用户?")) { var userList = new Array(); $("input[name='userCheck']:checked").each(function(){ userList.push($(this).val()); }); $.ajax({ type : "post", url : "<%=request.getContextPath() %>/user/batchDelete", data : {userList : userList.toString()}, success : function(){ alert("删除成功!"); location.reload(); }, error : function(){ alert("刪除失败!") } }); } }
The background Java processing code is as follows:
@RequestMapping(value="/batchDelete") public String batchDelete(String userList){ String[] strs = userList.split(","); for (int i = 0; i < strs.length; i++) { userService.delete(Integer.parseInt(strs[i])); } return "redirect:/user/users"; }
Recommended study: "javascript Advanced Tutorial"
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