溫馨提示×
您好，登錄后才能下訂單哦！
點擊 登錄注冊 即表示同意《億速云用戶服務條款》
您好，登錄后才能下訂單哦！
這篇文章主要講解了SpringMVC后端怎么返回數據到前端，內容清晰明了，對此有興趣的小伙伴可以學習一下，相信大家閱讀完之后會有幫助。
1.返回ModelAndView對象（.jsp）
controller代碼：
package controller;
import java.util.List;
import javax.annotation.Resource;
import model.Comment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import service.CommentService;
@Controller
//@RequestMapping("comment")
public class CommentController {
@Resource private CommentService commentService;
@RequestMapping(value="showComments")
public ModelAndView test(){
ModelAndView mav = new ModelAndView();
List<Comment> comments = commentService.selectAllComment();
for(Comment com:comments){
System.out.println(com.getC_text());
}
mav.addObject("msg",comments);
mav.setViewName("textIndex.jsp");
return mav;
}
}jsp頁面代碼
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>" rel="external nofollow" >
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" >
-->
</head>
<body>
<c:forEach items="${msg}" var="com">
${com.getUid()}:${com.getC_text()}:${com.getC_date()}<br>
</c:forEach>
</body>
</html>2.返回JSON數據到html頁面
利用ajax接收數據
ajax({
method:'post',
url:'http://localhost:8080/graduate/showComments.do',
data:'null',
success:function(response){
console.log(response);
}
})controller
@Controller
//@RequestMapping("comment")
public class CommentController {
@Resource private CommentService commentService;
@RequestMapping(value="showComments")
@ResponseBody
public List<Comment> test(){
List<Comment> comments = commentService.selectAllComment();
for(Comment com:comments){
System.out.println(com.getC_text());
}
return comments;
}
}3.順便記錄一下原生ajax,方便以后使用
function ajax(opt) {
opt = opt || {};
opt.method = opt.method.toUpperCase() || 'POST';
opt.url = opt.url || '';
opt.async = opt.async || true;
opt.data = opt.data || null;
opt.success = opt.success || function () {};
var xmlHttp = null;
if (XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
else {
xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
}var params = [];
for (var key in opt.data){
params.push(key + '=' + opt.data[key]);
}
var postData = params.join('&');
if (opt.method.toUpperCase() === 'POST') {
xmlHttp.open(opt.method, opt.url, opt.async);
xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=utf-8');
xmlHttp.send(postData);
}
else if (opt.method.toUpperCase() === 'GET') {
xmlHttp.open(opt.method, opt.url + '?' + postData, opt.async);
xmlHttp.send(null);
}
xmlHttp.onreadystatechange = function () {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
opt.success(JSON.parse(xmlHttp.responseText));
}
};
}看完上述內容，是不是對SpringMVC后端怎么返回數據到前端有進一步的了解，如果還想學習更多內容，歡迎關注億速云行業資訊頻道。
免責聲明：本站發布的內容（圖片、視頻和文字）以原創、轉載和分享為主，文章觀點不代表本網站立場，如果涉及侵權請聯系站長郵箱：is@yisu.com進行舉報，并提供相關證據，一經查實，將立刻刪除涉嫌侵權內容。
