最最常见两种,一则返回视图模板(文档),二则为json数据。就使用一个源代码文件来看看springmvc是怎么做到的。
1、UserController.java源代码文件
(这里额外的使用了fastjson架包来将对象解析为json)
package com.zay; import com.alibaba.fastjson.JSON; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; /** * Created by zay on 2016/11/29. */ @Controller @RequestMapping("/User/") public class UserController { /* * 前后端json数据交流 * */ @ResponseBody @RequestMapping("CheckUsername.do") public String checkUsername(HttpServletRequest request, HttpServletResponse response) throws IOException{ System.out.println(request.getParameter("username")); //获取username字段值 //这里可进行处理 //得到处理结果 AjaxModel ajax = new AjaxModel(); //自定义的 一个ajax数据模型,为了规范前后端数据交流。 ajax.setMsg("the password is wrong "); return JSON.toJSONString(ajax); } /* * 返回视图模板字符串,这里将自动补充先前spring配置的视图前后缀以确定最终的视图页面。 * */ @RequestMapping("register.do") public String register(){ return "register"; } }
2、其他文件的配置
springmvc-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 启动注解驱动的Spring MVC功能,注册请求url和注解POJO类方法的映射--> <mvc:annotation-driven /> <!-- 启动包扫描功能,以便注册带有@Controller、@Service、@repository、@Component等注解的类成为spring的bean --> <context:component-scan base-package="com.zay" /> <!-- 对模型视图名称的解析,在请求时模型视图名称添加前后缀 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" /> </beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> <!-- load-on-startup元素标记容器是否在启动的时候就加载这个servlet( 值必须是一个整数,表示servlet应该被载入的顺序 --> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
register.jsp
<%-- Created by IntelliJ IDEA. User: zay Date: 2016/11/29 Time: 15:56 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>注册页面</title> <script src="js/jquery-3.1.1.min.js"></script> <script> $(function(){ $("#user").blur(function(){ $.ajax({ url:‘/springmvc/User/CheckUsername.do‘, data:{ username:$("#user").val() }, dataType:"json", type:"POST", success:function(data,status){ alert(data.msg); } }); }); }); </script> </head> <body> <p>给自己找个登录名:</p> <input id="user" type="text" name="user"/> </body> </html>
3、架包的引用,除了基本的spring架包外,还使用了fastjson架包。
时间: 2024-10-03 13:38:37