复用代码系列：Map对象转换成具体对象，对象属性有List类型

约定不等于承诺〃 2022-05-26 13:15 171阅读 0赞

**[复用代码系列目录][Link 1]**

**对象例子：**

public class QiRadio extends FormMetadataElement {
    	private static final long serialVersionUID = -6870176756325551208L;
    
    	private String datatype; //数据类型
    	private String dsinterface;
    	private List<EnumdataElement> enumdata;
    	private String defaultvalue; //默认值
    	private String isrequired; //是否必填
    	private String isrelatebizfield; //是否关联业务字段
    	private String bizfield; //关联的业务字段
    	private String perms; //处理权限
    	private String isparam; //是否作为参数
    	private String ctrlclass; //控件class样式
    	private String eventscript; //控件脚本
    
    。。。。。
    }

**Converter类：**

public class EnumdataElementConverter implements Converter {
    
    	@Override
    	public Object convert(Class type, Object value) {
    
    		if (type == List.class) { //List类型
    			if (value instanceof JSONArray) {
    				List<EnumdataElement> list = new ArrayList<EnumdataElement>();
    
    				JSONArray arr = (JSONArray) value;
    				EnumdataElement element = null;
    				for (Iterator iterator = arr.iterator(); iterator.hasNext();) {
    					JSONObject job = (JSONObject) iterator.next();
    
    					element = new EnumdataElement();
    					element.setCode(job.getString("code"));
    					element.setName(job.getString("name"));
    
    					list.add(element);
    				}
    
    				return list;
    			}
    		} else if (type == EnumdataElement.class) { //具体类型
    			if (value instanceof JSONArray) {
    				JSONArray arr = (JSONArray) value;
    				JSONObject job = (JSONObject) arr.iterator().next();
    
    				EnumdataElement element = new EnumdataElement();
    				element.setCode(job.getString("code"));
    				element.setName(job.getString("name"));
    				return element;
    			} else if (value instanceof JSONObject) {
    				JSONObject job = (JSONObject) value;
    				EnumdataElement element = new EnumdataElement();
    				element.setCode(job.getString("code"));
    				element.setName(job.getString("name"));
    				return element;
    			}
    		}
    
    		return null;
    	}
    
    }

**使用时：**

ConvertUtils.register(new EnumdataElementConverter(), List.class);
    org.apache.commons.beanutils.BeanUtils.populate(element, map);

[Link 1]: https://blog.csdn.net/sunct/article/details/80175458