SpringMVC筆記九之ajax請求json資料
阿新 • • 發佈：2018-12-10
1、匯入jackson-annotations-2.2.1.jar，jackson-core-2.2.1.jar，jackson-databind-2.2.1.jar三個jar包，注意他們的版本要一致，不然會報錯。https://download.csdn.net/download/kshon/10654076
2、匯入jquery，直接使用Jquery框架封裝的ajax，方便簡介
3、在WebContent目錄下新建index.jsp檔案，注意jquery的路徑一定要寫對
<%@ 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>ajax資料處理</title> <script type="text/javascript" src="style/js/jquery-3.3.1.min.js"></script> <script type="text/javascript" > function requestAjax(){ $.post("testajax",function(data){ for(var i=0;i<data.length;i++){ alert(data[i].id+"-"+data[i].name); } }); } </script> </head> <body> <button onclick="requestAjax()">ajax請求json資料</button> </body> </html>
4、編寫一個pojo物件，src/pojo/Dept.java
package kshon.pojo; public class Dept { private int id; private String name; public Dept(int id,String name){ this.id = id; this.name = name; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
5、編寫控制器src/controller/AjaxController.java，一定要在方法前加上@ResponseBody註解，告訴spring這個方法的返回值不是頁面，純屬資料
package kshon.controller; import java.util.ArrayList; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import kshon.pojo.Dept; @Controller public class AjaxController { @ResponseBody @RequestMapping("testajax") public ArrayList<Dept> testajax(){ System.out.println("ajax請求"); Dept dept = new Dept(1,"kshon"); Dept dept2 = new Dept(2,"aaaa"); Dept dept3 = new Dept(3,"bbbb"); ArrayList<Dept> list = new ArrayList<Dept>(); list.add(dept); list.add(dept2); list.add(dept3); return list; } }
6、附上springmvc的配置檔案
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd">
<!-- spring自動掃描base-package下面的包或子包下面的java檔案(用了註解的java類必須被掃描才有效) -->
<context:component-scan base-package="kshon.controller,kshon.pojo" />
<!-- 設定配置方案 -->
<mvc:annotation-driven />
<!-- 使用預設的servlet響應靜態檔案 -->
<mvc:default-servlet-handler/>
<!-- 配置annotation型別的處理對映器 -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<!-- 配置annotation型別的處理器介面卡 -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
<!-- 檢視解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/content/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<!-- 國際化 -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames" value="message"></property>
</bean>
<!-- 國際化操作攔截器如果採用基於(session/cookie)則必須配置 -->
<mvc:interceptors>
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"></bean>
</mvc:interceptors>
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"></bean>
</beans>web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>SpringMVC</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springmvc</servlet-name>
<!-- 前端控制器 -->
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<!-- contextConfigLocation是引數名稱，該引數的值包含的是springmvc的配置檔案路徑 -->
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-config.xml</param-value>
</init-param>
<!-- 在web應用程式啟動時立即載入Servlet -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 指定spring的核心檔案，必須使用context-param，ContextLoaderListener才能找到 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-config.xml</param-value>
</context-param>
</web-app>