java-web开发怎么在前后端传参数

detail.html

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	var main = new Vue({
		el : '#main',
		data : {
			imageId : undefined,
			image : undefined,
		},
		methods : {
			getImageDetail : function(id) {
				this.$http.get('images?id=' + id).then(function(res) {
					console.log(res.body);
					if (res.body.code == 1000) {
						this.image = res.body.data;
					}
				}, function() {
					console.log('GET image failed.');
				});
			},
			click: function () {
				this.$http.get('images?id=' + this.imageId + '&favor=1').then(function (res) {
					console.log(res.body);						
					if (res.body.code == 1000) {
						this.image = res.body.data;
					}
				}, function () {
					console.log('GET images failed.');
				});
			}
		},
		mounted : function() {
			// 获取URL参数中ID的值
			this.imageId = utils.getValueByUrlParams("id");
			this.getImageDetail(this.imageId);
			//this.favor = 1;
		}
	});

ImageServlet

部分关键代码 。

if(request.getParameter("favor")!= null) {
     
					try {
     
						
						image = imageService.getImageById(Integer.valueOf(request.getParameter("id")));
						//点赞数+1
						image.setFavor(image.getFavor() + 1);
						imageService.update(image);
						response.getWriter().append(ResponseBuilder.createJson(image));
					} catch (NumberFormatException | SQLException e) {
     
						e.printStackTrace();
						response.getWriter().append(ResponseBuilder.createJson(ResponseCode.SERVICE_ERROR));
					}
				}else {
     
					try {
     
						image = imageService.getImageById(Integer.valueOf(request.getParameter("id")));
						response.getWriter().append(ResponseBuilder.createJson(image));
					} catch (NumberFormatException | SQLException e) {
     
						e.printStackTrace();
						response.getWriter().append(ResponseBuilder.createJson(ResponseCode.SERVICE_ERROR));
					}
				}

补充

html自然是在写前端了，然后通过请求servlet来对后端进行操作

传参：
this.$http.get(‘images?id=’ + this.imageId + ‘&favor=1’).then(function (res)

判断参数：
if(request.getParameter(“favor”)!= null)

按钮监听：
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click是函数名

函数体写在method里
click: function () {
this.$http.get(‘images?id=’ + this.imageId + ‘&favor=1’).then(function (res) {
console.log(res.body);
if (res.body.code == 1000) {
this.image = res.body.data;
}
}, function () {
console.log(‘GET images failed.’);
});