首页 > 代码库 > struts中实现ajax的配置信息

struts中实现ajax的配置信息

基于Struts2框架下实现Ajax有两种方式,第一种是原声的方式,另外一种是struts2自带的一个插件。

js部分调用方式是一样的:

JS代码:

 1 function testAjax() {
 2 
 3     var $userNameInput = $("#ajax_username");
 4     var userName = $userNameInput.val();
 5 
 6     $.ajax({
 7         url : "originAjax.action",
 8         type : "GET",
 9         data : "ajaxField=" + userName,
10         success : function(data, textStatus) {
11             alert(data);
12         }
13     });
14 }

第一种原生的实现方式:

Action中创建一个方法:

    private String username;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void checkUserName() throws IOException {

        HttpServletResponse response = ServletActionContext.getResponse();
        PrintWriter writer = response.getWriter();
        writer.print("hello " + username);
        writer.flush();
        writer.close();
    }

struts.xml中配置:

<action name="originAjax" class="TestAction" method="checkUserName" />  

这种方式不太推荐使用。

这里重点讲解下第二种方式:

1.引入struts2-json-plugin-2.5.2.jar 

2.Action中添加类似的如下代码:

private String result;
public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }
/**
     * 
     * AJAX for check MerchantAccount start
     * 
     * */
    private String merchantAccount;

    public String getMerchantAccount() {
        return merchantAccount;
    }

    public void setMerchantAccount(String merchantAccount) {
        this.merchantAccount = merchantAccount;
    }

    // AJAX for check Merchant
    public String checkMerchantAccountMethod() throws IOException {

         AppResultJsonBean ajaxResultJsonBean = new AppResultJsonBean();

        if (StarCloudStringUtils.isEmpty(merchantAccount)) {

            ajaxResultJsonBean.setIsOK(false);
            ajaxResultJsonBean.setData(null);
            ajaxResultJsonBean.setResultCode(-1);
            ajaxResultJsonBean.setResultMessage("商家账号不能为空");
            ajaxResultJsonBean.setOther(null);

            JSONObject ajaxResultJsonData =http://www.mamicode.com/ JSONObject
                    .fromObject(ajaxResultJsonBean);

            this.result = ajaxResultJsonData.toString();
            
            return SUCCESS;
        }

        if (!StarCloudStringUtils.isMobile(merchantAccount)) {

            ajaxResultJsonBean.setIsOK(false);
            ajaxResultJsonBean.setData(null);
            ajaxResultJsonBean.setResultCode(-2);
            ajaxResultJsonBean.setResultMessage("商家账号格式不合法");
            ajaxResultJsonBean.setOther(null);

            JSONObject ajaxResultJsonData =http://www.mamicode.com/ JSONObject.fromObject(ajaxResultJsonBean);

            this.result = ajaxResultJsonData.toString();
            
            return SUCCESS;
        }

        。。。
        MerchantBean checkMerchantBean = merchantIService.findMerchantByAccount(merchantAccount);

        if (checkMerchantBean != null) {

            ajaxResultJsonBean.setIsOK(true);
            ajaxResultJsonBean.setData(null);
            ajaxResultJsonBean.setResultCode(0);
            ajaxResultJsonBean.setResultMessage("商家账号可用");
            ajaxResultJsonBean.setOther(null);

            JSONObject ajaxResultJsonData =http://www.mamicode.com/ JSONObject.fromObject(ajaxResultJsonBean);

            this.result = ajaxResultJsonData.toString();

            return SUCCESS;
        } else {
            ajaxResultJsonBean.setIsOK(false);
            ajaxResultJsonBean.setData(null);
            ajaxResultJsonBean.setResultCode(-3);
            ajaxResultJsonBean.setResultMessage("商家账号不存在");
            ajaxResultJsonBean.setOther(null);

            JSONObject ajaxResultJsonData =http://www.mamicode.com/ JSONObject.fromObject(ajaxResultJsonBean);

            this.result = ajaxResultJsonData.toString();
            return SUCCESS;
        }
    }
    /**
     * 
     * AJAX for check MerchantAccount start end
     * 
     * */

Struts.xml中配置如下:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>

    <!-- AJAX 
    1.引入Jar包
    2.所在包必须要继承自JSON-default
    3.resultType是JSON
    4.附加了一个参数excludeNullProperties,目的是不序列化Action里为null的字段。
    5.<result>元素没有name属性,也没有跳转值 
    -->
    <package name="struts_web_product_ajax" extends="json-default">
         <!-- 新增商品信息检查账号 -->
        <action name="checkMerchantAccountAction" class="controllers.actions.web.product.PrepareAddProductAction" method="checkMerchantAccountMethod">
            <result type="json">  
                <param name="excludeNullProperties">true</param>  
                <param name="root">result</param>
            </result> 
         </action>     
    </package>  
</struts>

JS中接受返回结果:

返回JSON格式:

技术分享

JS解析如下:

function checkMerchantAccountAjax() {

    var $merchantAccount = $("#merchantAccount");
    var merchantAccount = $merchantAccount.val();

    $.ajax({
                url : "checkMerchantAccountAction",
                type : "GET",
                data : "merchantAccount=" + merchantAccount,
                success : function(data, textStatus) {
                    var resultJSONData =http://www.mamicode.com/ JSON.parse(data);//注意这里必须有,因为之前返回的是result="json字符串",但并类型不是JSON
                    if(resultJSONData.isOK){
                            $merchantAccount.css("color", "black");
                            return true;
                    }else{
                        $merchantAccount.css("color", "red");
                        layer.tips(resultJSONData.resultMessage,$merchantAccount, {
                                        tips : [3, ‘#3595CC‘],
                                        time : 4000
                        });//end tips
                        return false;
                    }//end else
                    
                }//end success
            });//end ajax
}// end js

struts中实现ajax的配置信息