package com.tgsit.cjd.utils;
/**
 * 日期类型转换器：
 *     自动格式化对象中的日期类型
 */
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;
public class JsonDateValueProcessor implements JsonValueProcessor{
  private String format ="yyyy-MM-dd"; 
  public JsonDateValueProcessor() { 
    super(); 
  }  
  public JsonDateValueProcessor(String format) { 
    super(); 
    this.format = format; 
  } 
  @Override 
  public Object processArrayValue(Object paramObject, 
      JsonConfig paramJsonConfig) { 
    return process(paramObject); 
  } 
  @Override 
  public Object processObjectValue(String paramString, Object paramObject, 
      JsonConfig paramJsonConfig) { 
    return process(paramObject); 
  }  
  private Object process(Object value){ 
    if(value instanceof Date){  
      SimpleDateFormat sdf = new SimpleDateFormat(format,Locale.CHINA);  
      return sdf.format(value); 
    }  
    return value == null "" : value.toString();  
  } 
}

<dependency>
   <groupId>net.sf.json-lib</groupId>
   <artifactId>json-lib</artifactId>
   <version>2.4</version>
   <classifier>jdk15</classifier>
</dependency>

@RequestMapping(value = "/exportInfo", method = RequestMethod.GET)
  @ResponseBody
  public String exportInfo(HttpServletResponse response) throws Exception{
    List<QueryVo> exportInfoList = queryVoService.exportInfo();
    if(exportInfoList != null && exportInfoList.size() > 0){
      List<Object> result = new ArrayList<Object>();
      JsonResult model = null;
      for (QueryVo queryVo : exportInfoList) {
        OwnerInfo ownerInfo = ownerInfoService.selectOwnerInfoByVIN(queryVo.getVin());
        List<MortgagerInfo> morInfoList = mortgagerInfoService.selectByVIN(queryVo.getVin());
        List<TransferInfo> traInfoList = transferInfoService.selectByVIN(queryVo.getVin());
        model = new JsonResult();
        model.setOwnerInfo(ownerInfo);
        model.setMortgagerInfo(morInfoList);
        model.setTransferInfo(traInfoList);
        result.add(model);
      }
      //调用自定义日期类型转换器，自动格式化对象中的日期类型的字段值
      JsonConfig jsonConfig = new JsonConfig(); 
      jsonConfig.registerJsonValueProcessor(Date.class, new JsonDateValueProcessor());
      return CGSConstants.returnJson(CGSConstants.SUCCESS,"导出成功",JSONArray.fromObject(result, jsonConfig));
    }
    return CGSConstants.returnJson(CGSConstants.SUCCESS,"尚无数据",null);
  }