DIV CSS 佈局教程網

 DIV+CSS佈局教程網 >> 網頁腳本 >> JavaScript入門知識 >> AJAX入門 >> AJAX基礎知識 >> SpringMVC環境下實現的Ajax異步請求JSON格式數據
SpringMVC環境下實現的Ajax異步請求JSON格式數據
編輯:AJAX基礎知識     

一 環境搭建

首先是常規的spring mvc環境搭建,不用多說,需要注意的是,這裡需要引入jackson相關jar包,然後在spring配置文件“springmvc-servlet.xml”中添加json解析相關配置,我這裡的完整代碼如下:

<?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: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-4.0.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 避免IE執行AJAX時,返回JSON出現下載文件 -->
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
<property name="objectMapper">
<bean class="org.codehaus.jackson.map.ObjectMapper">
<property name="dateFormat">
<bean class="java.text.SimpleDateFormat">
<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss"></constructor-arg>
</bean>
</property>
</bean>
</property>
</bean>
<!-- 啟動Spring MVC的注解功能,完成請求和注解POJO的映射 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json轉換器 -->
</list>
</property>
</bean>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager" />
<bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<!-- true,開啟擴展名支持,false關閉支持 -->
<property name="favorPathExtension" value="false" />
<!-- 用於開啟 /userinfo/123?format=json的支持 -->
<property name="favorParameter" value="true" />
<!-- 設置為true以忽略對Accept Header的支持 -->
<property name="ignoreAcceptHeader" value="false" />
<property name="mediaTypes">
<value>
atom=application/atom+xml
html=text/html
json=application/json
xml=application/xml
*=*/*
</value>
</property>
</bean>
<context:annotation-config />
<!-- 啟動自動掃描該包下所有的Bean(例如@Controller) -->
<context:component-scan base-package="cn.zifangsky.controller" />
<mvc:default-servlet-handler />
<!-- 定義視圖解析器 -->
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="requestContextAttribute" value="rc" />
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
<property name="order" value="1"></property>
</bean>
</beans>

項目結構:

注:我這裡測試使用的完整jar包:http://pan.baidu.com/s/1dEUwdmL

二 測試實例

(1)在WEB-INF/jsp目錄下新建了一個index.jsp文件,包含了簡單的jQuery的ajax請求,請求數據的格式是JSON,具體代碼如下:

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<base href="<%=basePath%>">
<script type="text/javascript" src="scripts/jquery/jquery-1.6.2.min.js"></script>
<script type="text/javascript" src="scripts/jquery/jquery.i18n.properties-min-1.0.9.js"></script>
<script type="text/javascript" src="scripts/jquery/jquery.autocomplete.js"></script>
<script type="text/javascript" src="scripts/jquery/jquery.loadmask.js"></script>
<script type="text/javascript" src="scripts/jquery/jquery.form.js"></script>
<script type="text/javascript" src="scripts/jquery/jquery.timers.js"></script>
<title>jQuery i18n</title>
<script type="text/javascript">
$().ready(
function() {
$("#sub").click(
function() {
var name = $("#username").val();
var age = 18;
var user = {"username":name,"age":age};
$.ajax({
url : 'hello.json',
type : 'POST',
data : JSON.stringify(user), // Request body 
contentType : 'application/json; charset=utf-8',
dataType : 'json',
success : function(response) {
//請求成功
alert("你好" + response.username + "[" + response.age + "],當前時間是:" + response.time + ",歡迎訪問:http://www.zifangsky.cn");
},
error : function(msg) {
alert(msg);
}
});
});
});
</script>
</head>
<body>
<input type="text" id="username"
style="width: 100px; height: 30px; font-size: 20px; font-weight: bold;">
<input type="button" id="sub" value="Go"
style="height: 40px; height: 30px;">
<br>
</body>
</html>

(2)一個簡單的model類User,代碼如下:

package cn.zifangsky.controller;
public class User {
private String username;
private int age;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}

(3)controller類TestController.java:

package cn.zifangsky.controller;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
@Controller
@Scope("prototype")
public class TestController {
/**
* 轉到頁面
*/
@RequestMapping(value = "/hello.html")
public ModelAndView list() {
ModelAndView view = new ModelAndView("index");
return view;
}
/**
* ajax異步請求, 請求格式是json
*/
@RequestMapping(value = "/hello.json", method = { RequestMethod.POST })
@ResponseBody
public Map<String, String> hello(@RequestBody User user) {
// 返回數據的Map集合
Map<String, String> result = new HashMap<String, String>();
Format format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 返回請求的username
result.put("username", user.getUsername());
// 返回年齡
result.put("age", String.valueOf(user.getAge()));
// 返回當前時間
result.put("time", format.format(new Date()));
return result;
}
}

關於具體的執行步驟我簡單說一下:

i)項目啟動後,在浏覽器中訪問:http://localhost:8089/SpringDemo/hello.html,然後會轉到執行controller中的list方法,接著會轉到/WEB-INF/jsp/index.jsp(PS:在controller中返回的是邏輯視圖,跟在springmvc-servlet.xml文件中定義的路徑前綴和後綴進行拼接後合成文件的真正路徑)

ii)在index.jsp頁面輸入文字然後點擊按鈕,將會觸發ajax請求,這個請求會獲取輸入框中的數據和默認的“age”參數拼接成json格式字符串最後提交到“hello.json”這個請求,也就是執行controller中的hello方法

iii)hello方法執行完畢後會返回一系列數據最後在頁面中顯示出來

(4)效果如下:

以上所述是小編給大家介紹的SpringMVC環境下實現的Ajax異步請求JSON格式數據的相關內容,希望對大家有所幫助!

XML學習教程| jQuery入門知識| AJAX入門| Dreamweaver教程| Fireworks入門知識| SEO技巧| SEO優化集錦|
Copyright © DIV+CSS佈局教程網 All Rights Reserved