Struts2的JSON插件与JSON类型的Result

ゝ一世哀愁。 2021-07-25 00:56 317阅读 0赞

**一 视图**

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <%@ taglib prefix="s" uri="/struts-tags" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>使用JSON插件</title>
        <script src="${pageContext.request.contextPath}/jquery-1.11.1.js"
        type="text/javascript">
        </script>
        <script type="text/javascript">
            function gotClick()
            {
                $("#show").hide();
                // 指定向JSONExample发送请求，将id为form1的表单所包含的表单控件转换为请求参数
                $.post("JSONExample" , $("#form1").serializeArray() ,
                    // 指定回调函数
                    function(data , statusText)
                    {
                        $("#show").height(80)
                            .width(240)
                            .css("border" , "1px solid black")
                            .css("border-radius" , "15px")
                            .css("background-color" , "#efef99")
                            .css("color" , "#ff0000")
                            .css("padding" , "20px")
                            .empty();
                        // 遍历JavaScript对象的各属性
                        for(var propName in data)
                        {
                            $("#show").append(propName + "-->"
                                + data[propName] + "<br />");
                        }
                        $("#show").show(600);
                    },
                    // 指定服务器响应为JSON数据
                    "json");
            }
        </script>
    </head>
    <body>
    <s:form id="form1">
        <s:textfield name="field1" label="Field 1"/>
        <s:textfield name="field2" label="Field 2"/>
        <s:textfield name="field3" label="Field 3"/>
        <tr><td colspan="2">
        <input type="button" value="提交" onclick="gotClick();"/>
        </td></tr>
    </s:form>
    <div id="show">
    </div>
    </body>
    </html>

**二 配置**

<?xml version="1.0" encoding="GBK"?>
    <!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">
    <struts>
        <constant name="struts.i18n.encoding" value="UTF-8"/>
        <package name="example" extends="json-default">
            <action name="JSONExample" class="org.crazyit.app.action.JSONExample">
                
                <result type="json">
                    
                    <param name="noCache">true</param>
                    <param name="contentType">text/html</param>
                    
                    
                </result>
            </action>
            <action name="*">
                <result>/WEB-INF/content/{1}.jsp</result>
            </action>
        </package>
    </struts>

**三 action**

package org.crazyit.app.action;
    
    import java.util.HashMap;
    import java.util.Map;
    
    import com.opensymphony.xwork2.Action;
    import org.apache.struts2.json.annotations.JSON;
    
    public class JSONExample
    {
        // 模拟处理结果的成员变量
        private int[] ints = {10, 20};
        private Map<String , String> map
            = new HashMap<String , String>();
        private String customName = "顾客";
        // 封装请求参数的三个成员变量
        private String field1;
        // 'transient'修饰的成员变量不会被序列化
        private transient String field2;
        // 没有setter和getter方法的成员变量不会被序列化
        private String field3;
    
        public String execute()
        {
            map.put("name", "疯狂Java讲义");
            return Action.SUCCESS;
        }
    
        // 使用注解来改变该成员变量序列化后的名字
        @JSON(name="newName")
        public Map getMap()
        {
            return this.map;
        }
    
        // customName的setter和getter方法
        public void setCustomName(String customName)
        {
            this.customName = customName;
        }
        public String getCustomName()
        {
            return this.customName;
        }
    
        // field1的setter和getter方法
        public void setField1(String field1)
        {
            this.field1 = field1;
        }
        public String getField1()
        {
            return this.field1;
        }
    
        // field2的setter和getter方法
        public void setField2(String field2)
        {
            this.field2 = field2;
        }
        public String getField2()
        {
            return this.field2;
        }
    
        // field3的setter和getter方法
        public void setField3(String field3)
        {
            this.field3 = field3;
        }
        public String getField3()
        {
            return this.field3;
        }
    }

**四 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/c3885fac40704ffb9bf505adeb0277ef.png