IDEA中通过Map返回JSON字符串

来源：互联网发布：你愿意做程序员么编辑：程序博客网时间：2024/06/15 03:13

项目用到，简单记录下使用方法：

1.项目中要引入struts2-json-plugin.jar包

2.到Project Structure - Facets - Struts2 - File sets - Default File Set 增加 jar 包内的 struts-plugin.xml

3.在Action类中加入如下代码：

package com.action;import com.biz.IUserBiz;import com.entity.UserEntity;import com.opensymphony.xwork2.ActionSupport;import java.util.List;import java.util.HashMap;import java.util.Map;public class MapUserAction extends ActionSupport{    private String loginName;    private String loginPwd;    //将会被Struts2序列化为JSON字符串的对象，必须有该属性的getter方法    private Map<String, Object> dataMap;    /* 构造方法 */    public MapUserAction() {        dataMap = new HashMap<>();    //初始化Map对象    }    public Map<String, Object> getDataMap() {        return dataMap;    }    public void setLoginName(String loginName){        this.loginName = loginName;    }    public void setLoginPwd(String loginPwd){        this.loginPwd = loginPwd;    }    private IUserBiz userBiz;    public void setUserBiz(IUserBiz userBiz){        this.userBiz = userBiz;    }    /** 测试通过action以Struts2默认方式返回JSON数据 **/    public String MapToJSON() throws Exception {        List list = userBiz.login(loginName,loginPwd);        if(list.size()>0){            UserEntity user = (UserEntity)list.iterator().next();            // dataMap中的数据将会被Struts2转换成JSON字符串，所以这里要先清空其中的数据            dataMap.clear();            dataMap.put("ID",user.getId());            dataMap.put("Account",user.getAccount());            dataMap.put("Name",user.getName());            dataMap.put("Phone",user.getPhone());            dataMap.put("Type",user.getType());            if(user.getCarListByCar()!= null){                dataMap.put("CarID",user.getCarListByCar().getCarId());                dataMap.put("CarNum",user.getCarListByCar().getCarNum());                dataMap.put("CarName",user.getCarListByCar().getCarName());                dataMap.put("CarModel",user.getCarListByCar().getCarModel());                dataMap.put("CarStatus",user.getCarListByCar().getCarStatus());            }            dataMap.put("loginStatus","True");            return SUCCESS;        }else {            dataMap.clear();            dataMap.put("loginStatus","False");            return SUCCESS;        }    }}

4.接下来配置Spring-config.xml

    <bean id ="userDao" class="com.dao.UserDaoImpl">        <property name="sessionFactory" ref="sessionFactory"/>    </bean>    <bean id = "userBiz" class="com.biz.UserBiz">        <property name="userDao" ref="userDao"/>    </bean>    <bean id="mapAction" class="com.action.MapUserAction" scope="prototype">        <property name="userBiz" ref="userBiz"/>    </bean>

5.下面配置Struts.xml

<package name="json" extends="json-default" namespace="/Test">    <action name="MapTest" class="mapAction" method="MapToJSON">        <result type="json"><!--默认序列化返回所有getter方法-->            <param name="root">dataMap</param><!-- root 返回 dataMap 注释掉将返回全部 -->    <!--<param name="excludeNullProperties">true</param>-->    <!--<param name="excludeProperties">loginPwd</param>-->
        </result>
    </action>
</package>

0 0