1.项目结构
2.user_info.jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" ???pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/jQuery1.9.1.js"></script><script type="text/javascript"> ???$().ready(function() { ???????????????$("#but01").click(function() { ???????????var userNumber=$("#userNumber").val(); ???????????if(userNumber.length==0){ ???????????????alert(‘请输入账号！‘); ???????????}else { ???????????????$.post("ajaxUser.do",{userNumber:userNumber},function(data){ ???????????????????alert(data); ???????????????}) ???????????} ???????}); ???}); ???????$().ready(function() { ???????????????$("#but02").click(function() { ???????????var userId=$("#userId").val(); ???????????if(userId.length==0){ ???????????????alert(‘请输入账号！‘); ???????????}else { ???????????????$.post("ajaxUser2.do",{userId:userId},function(data){ ???????????????????alert(data.userId+"---"+data.userName+"---"+data.userAge); ???????????????},"json") ???????????} ???????}); ???}); ???</script></head><body><hr>账号：<input type="text" id="userNumber" name="userNumber"/> ???<input type="button" id="but01" value="验证"><hr/>账号：<input type="text" id="userId" name="userId"/> ???<input type="button" id="but02" value="登录"><hr/></body></html>3.UserController.java代码
package com.spring;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.spring.po.UserInfor;@Controllerpublic class UserController { ???@RequestMapping("/ajaxUser.do") ???public void userNumber(String userNumber,HttpServletResponse response){ ????????????????try { ???????????response.setContentType("text/html"); ???????????response.setCharacterEncoding("utf-8"); ???????????PrintWriter out=response.getWriter(); ???????????if ("dong".equals(userNumber)) { ???????????????out.println("对不起，请重新输入账号！"); ???????????}else { ???????????????out.println("恭喜您，账号可以使用！"); ???????????} ???????????out.flush(); ???????????out.close(); ???????} catch (IOException e) { ???????????// TODO Auto-generated catch block ???????????e.printStackTrace(); ???????} ???????????????System.out.println(userNumber); ???} ???????????@RequestMapping("/ajaxUser2.do") ???public @ResponseBody UserInfor ajaxUser(Integer userId){ ???????????????System.out.println("编号："+userId); ???????UserInfor user=new UserInfor(); ???????user.setUserId(userId); ???????user.setUserName("董诗原"); ???????user.setUserAge(18); ???????return user; ???}}@ResponseBody用来返回对象
3.springmvc-servlet.xml代码
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" ???xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ???xmlns:mvc="http://www.springframework.org/schema/mvc" ???xmlns:context="http://www.springframework.org/schema/context" ???xmlns:p="http://www.springframework.org/schema/p" ???xsi:schemaLocation=" ???????http://www.springframework.org/schema/mvc ????????http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd ???????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-3.0.xsd "> ???<!-- Springmvc注解驱动 --> ???????<mvc:annotation-driven /> ???????<!-- 扫描器 --> ???<context:component-scan base-package="com.spring" /> ???????<!-- 配置视图解析器 --> ???<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> ???????<!-- 前缀 --> ???????<property name="prefix" value="/"></property> ???????<!-- 后缀 --> ???????<property name="suffix" value=".jsp"></property> ???</bean> ???????????????<!-- 从请求响应读取/编写字符串 --> ???<bean id="stringHttpMessage" class="org.springframework.http.converter.StringHttpMessageConverter"> ???????<property name="supportedMediaTypes"> ???????????<list> ???????????????<value>text/plain;charset=UTF-8</value> ???????????</list> ???????</property> ???</bean> ???????<!-- 用于对象转化成json --> ???<bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean> ???????<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> ???????<property name="messageConverters"> ???????????<list> ???????????????<ref bean="stringHttpMessage"/> ???????????????<ref bean="jsonConverter"/> ???????????</list> ???????</property> ???</bean> ???</beans>
增加请求响应读取、字符集、对象转换
4.视图
SringMVC Ajax
原文地址：https://www.cnblogs.com/2016024291-/p/8206261.html