[ javascript ] Json中添加List!_jsonobject add list-优快云博客

本文链接：https://blog.youkuaiyun.com/yangzhihello/article/details/8185781

本文介绍了一个具体的Java后台与JavaScript前端交互案例。后台使用Java处理业务逻辑，从前端接收请求并返回数据；前端则用JavaScript处理这些数据，并展示给用户。涉及的数据包括课程选择、题目详情等。

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后台java代码！

	
            obj = questionService.showSubjectInfo(subjectid,subjectType);
		Teacher teacher = (Teacher) ActionContext.getContext().getSession()
		.get("teacherInfo");
		int departid = teacher.getDepartment().getDepartId();
		List<Object[]> courseList = courseService.findAllCourseByDepart(1, 10, departid);
		Object[] o = new Object[]{courseList};
		obj.add(o);
		
		return "success";

javascript代码：

	var data = xmlReq.responseText;
						var list = eval("(" + data + ")");
						var div = document.getElementById("dialog");
						var result = "请选择课程:<select>";

						var courses = list.obj[1];
						var courseList = courses[0];

						for(var k = 0 ; k< courseList.length ; k ++){
								var courseVal = courseList[k];
							result +="<option value = '" + courseVal[0]+ "' > " +courseVal[1]+"</option>";
						}
						result += "</select><br/>";
						
						for(var i = 0 ; i < list.obj.length; i ++){
							var o = list.obj[i];
								if(i ==0){
									result += "<lable>title</lable><br/><span><textarea name = 'title' style = 'width:90%;height:100px;'>" + o[1]+ "</textarea></span><br/><label>options</label><br/>";
								result += "<table border = '1' id = 'mytable'>";
									var arr = new Array();
									arr = o[2].split('‖');
									for(var j = 0 ; j < arr.length; j=j +2){
										result += "<tr><td><span><input type = 'checkbox'/></td><td>  " + arr[j]+ "<input class = 'answer' name = 'selectOption' type = 'text' value = '" + arr[j + 1]+"'/></span></td></tr>";
									}			
								}
								
						}
						result += "</table><input type = 'submit' value = '增加选项' onclick = 'addOption()'><input type = 'submit' value = '删除选项' onclick = 'delOption()'/><br/></input><input type = 'submit' value = 'update' onclick = 'updateSelect()'>"
						div.innerHTML = result;
						show();