java之spring mvc之ajax

约定不等于承诺〃 2021-11-01 09:36 405阅读 0赞

1.可以使用servletAPI来实现 ajax

Controller 类

@Controller
    public class AjaxController {
        @RequestMapping("/ajax.do")
        public String ajax(HttpServletResponse resp) throws IOException{
            resp.getWriter().print("ajax hello");
            return null;
        }
    }

Jsp

2. 使用 springmvc 提供的组件来实现 ajax

导入 jackson 的相关包：

![1182288-20190731235848396-1509125986.png][]

Controller 处理

@RequestMapping("/json.do")
        @ResponseBody//将返回内容插入页面中
        public List<User> list(){
            List<User> list = new ArrayList<User>();
            list.add(new User(1,"张三",22));
            list.add(new User(2,"李四",32));
            return list;
        }

配置文件

<bean id="stringConverter"  
            class="org.springframework.http.converter.StringHttpMessageConverter">  
            <property name="supportedMediaTypes">  
                <list>  
                    <value>text/plain;charset=UTF-8</value>  
                </list>  
            </property>  
        </bean>  
        <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="stringConverter" />  
                    <ref bean="jsonConverter" />  
                </list>  
            </property>  
        </bean>

Jsp 页面

配置优化

<?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:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.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.xsd">
        
        <bean id="viewResolver"
            class="org.springframework.web.servlet.view.UrlBasedViewResolver">
            <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
               
            <property name="prefix" value="/WEB-INF/jsp/"/>
            
            <property name="suffix" value=".jsp"/>
        </bean>
        <mvc:annotation-driven/>
        <context:component-scan base-package="cn.sxt.controller"/>
    </beans>

github地址：[https://github.com/Vincent-yuan/springmvc\_ajax][https_github.com_Vincent-yuan_springmvc_ajax]

转载于:https://www.cnblogs.com/Vincent-yuan/p/11279971.html

[1182288-20190731235848396-1509125986.png]: /images/20211101/3b80931b0d2c4f1b8bd220294067adbb.png
[https_github.com_Vincent-yuan_springmvc_ajax]: https://github.com/Vincent-yuan/springmvc_ajax