Spring的web应用启动加载数据字典

阳光穿透心脏的1/2处 2022-04-04 12:26 234阅读 0赞

1、配置文件中加入配置

在web.xml中加入  监听配置， 但要写在Spring配置的下面

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
    
      <listener>
    	<listener-class>com.config.InitListener</listener-class>
      </listener>

2、监听程序

InitListener.java

import java.util.List;
    import java.util.Map;
    
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.context.ContextLoader;
    import org.springframework.web.context.WebApplicationContext;
    
    import com.shxp.core.ProbeUtils;
    import com.shxp.task.service.ImageScanningService;
    
    
    public class InitListener implements ServletContextListener{
    	private static final Logger log = LoggerFactory.getLogger(InitListener.class);
    	@Autowired
    	ImageScanningService imageScanningService;
    	public void contextInitialized(ServletContextEvent sce) {
    		
    		System.out.println("--------------------------start InitServlet--------------------------------------");
    		WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();  
    		ImageScanningService imageScanningService =(ImageScanningService)wac.getBean("imageScanningService");
    		List<Map<String,Object>> list = imageScanningService.getProbeList();
    		ProbeUtils.setList(list);
    		System.out.println("--------------------------end InitServlet----------------------------------------");
    		
    	}
    	
    	public void contextDestroyed(ServletContextEvent arg0) {
    	}
    }

注：ImageScanningService.java

import java.util.List;
    import java.util.Map;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.shxp.task.entity.MultipleImages;
    import com.shxp.task.mapper.ImageScanningMapper;
    @Service
    public class ImageScanningService implements IImageScanningService{
    
    	@Autowired
    	ImageScanningMapper imageScanningMapper;
    	
    	public List<Map<String, Object>> getProbeList() {
    		// TODO Auto-generated method stub
    		return imageScanningMapper.getProbeList();
    	}
    
    	
    }

注：IImageScanningService.java

import java.util.List;
    import java.util.Map;
    
    import com.shxp.task.entity.MultipleImages;
    
    public interface IImageScanningService {
    
    	public void addImagesList(List<MultipleImages> imageslist) ;
    	public void addImagesfilter(Map<String, Object> map);
    	public void delImageTemp(Map<String, Object> map);
    }

注：ImageScanningMapper.java

import java.util.List;
    import java.util.Map;
    
    import com.shxp.task.entity.MultipleImages;
    
    public interface ImageScanningMapper {
    
    	public List<Map<String, Object>> getProbeList();
    }

注：ImageScanningMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper      
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"      
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.shxp.task.mapper.ImageScanningMapper">
    
    <select id="getProbeList" parameterType="hashmap" resultType="hashmap">
    		select * from facerec.face_multiple_probe t
    </select>
    </mapper>

注：ProbeUtils.java

import java.util.ArrayList;
    import java.util.List;
    import java.util.Map;
    /****
     * 
     * 字典工具类
     * @author lzl
     *
     */
    public class ProbeUtils {
    
    	public static List<Map<String,Object>> siteList = new ArrayList<Map<String,Object>>();
    	public static void setList( List<Map<String,Object>> dictLs){
    		siteList = dictLs;
    	}
    	
    	/*****
    	 * 获取face_probe_deviceid
    	 * @param uuid
    	 * @return
    	 */
    	public static String getDeviceid(String uuid){
    		String keyValue = "0";
    		for(Map<String,Object>rsMap : siteList){
    			if(uuid.equals(rsMap.get("FACE_PROBE_UUID").toString())){
    				keyValue = rsMap.get("FACE_PROBE_DEVICEID").toString();
    				break;
    			}
    		}
    		return keyValue;
    	}
    }