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• org.docshare
• yangmvc
• 2022.12.15
• source code
• BeanUtil.java

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org.docshare.util.BeanUtil Maven / Gradle / Ivy

package org.docshare.util;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Properties;

import org.docshare.log.Log;
import org.docshare.mvc.IBean;

public class BeanUtil {
	public static List propList(Object obj){
		List ret = new ArrayList();
		Field[] fa = obj.getClass().getFields();
		Method[] ma = obj.getClass().getMethods();
		for(Field f: fa){
			//System.out.println("Field "+f.getName()+" "+f.getType().getName());
			ret.add(f.getName());
		}
		for(Method m: ma){
			String name = m.getName();
			if(name.startsWith("set") && name.length()> 3 ){
				ret.add(TextTool.firstLower(name.substring(3)));
			}
		}
		return ret; 
	}
	public static HashMap obj2Map(Object obj) {
		HashMap ret=new HashMap();
		
		Field[] fa = obj.getClass().getFields();
		Method[] ma = obj.getClass().getMethods();
		for(Field f: fa){
			//System.out.println("Field "+f.getName()+" "+f.getType().getName());
		//	ret.add(f.getName());
			try {
				//if(f.isAccessible()){
				Object v = f.get(obj);
				if(v!= null && v instanceof IBean){
					v  = obj2Map(v);
				}
				ret.put(f.getName(), v);
				//}
			} catch (Exception e) {
				Log.d(e);
			} 
		}
		for(Method m: ma){
			String name = m.getName();
			if(name.startsWith("get") && ! name.equals("getClass")  && name.length()> 3 ){
				Object v;
				try {
					v = m.invoke(obj, (Object[]) null);
					ret.put(TextTool.firstLower(name.substring(3)),v);
				} catch (Exception e) {
					e.printStackTrace();
				}
		//		ret.add(TextTool.firstLower(name.substring(3)));
			}
		}
		return ret;
		
	}
	private static Method getMethod(Object obj,String mname){
		Method[] ma = obj.getClass().getMethods();
		for(Method m: ma){
			//System.out.println("method "+m.getName());
			if(mname.equals(m.getName())){
				return m;
			}
		}
		return null;
	}
	public static Object get(Object obj,String pname){
		if(pname.contains(".")){ //这是一个复合参数
			pname = TextTool.getBefore(pname, ".");
		}
		Class clazz = obj.getClass();
		try {
			Field f = clazz.getField(pname);
			if(f != null){
				return f.get(obj);
			}	
		} catch (Exception e) {
			//  handle exception
		}

		String getname = "get"+TextTool.firstUpper(pname);
		Method getm = getMethod(obj, getname);
		if(getm == null)return null;
		try {
			Object fieldVal = getm.invoke(obj);
			return fieldVal;
		} catch (Exception e) {
			Log.d(e);
		}
		
		return null;
	}
	public static boolean set(Object obj,String pname,Object val){
		String sub = null;
		if(pname.contains(".")){ //这是一个复合参数
			sub = TextTool.getAfter(pname, ".");
			pname = TextTool.getBefore(pname, ".");
		}
		Class clazz = obj.getClass();
		try {
			Field f = clazz.getField(pname);
			//if(f.getType())
			if(sub == null){
				f.set(obj, transType(val,f.getType().getSimpleName()));
			}else{ //如果有.存在，则找到下一级
				Object fieldVal = f.get(obj);
				set(fieldVal, sub, val);
			}
			return true;
		}catch (SecurityException e) {
			Log.e("SecurityException");
			e.printStackTrace();
		} catch (NoSuchFieldException e) {
			//e.printStackTrace();
		} catch (IllegalArgumentException e) {
			String t ;
			if(val == null) t = null;
			else t = val.toString();
			Log.e("arg type not match class=%s , fiend = %s , valtype = %s  val=  %s",obj.getClass().getName(),pname,val.getClass().getName(),t);
			//e.printStackTrace();
		} catch (IllegalAccessException e) {
			String getname = "get"+TextTool.firstUpper(pname);
			Method getm = getMethod(obj, getname);
			if(getm == null){
				Log.e("IllegalAccessException of class %s ,field  %s    make sure the class and field are all public"
						,obj.getClass().getName(),pname);
				//e.printStackTrace();
			}
		}
		
		Method setm,getm;
		try {
			if(sub !=null){
				String getname = "get"+TextTool.firstUpper(pname);
				getm = getMethod(obj, getname);
				Object fieldVal = getm.invoke(obj);
				if(fieldVal == null) return false;
				set(fieldVal,sub,val);
			}else{
				String setname = "set"+TextTool.firstUpper(pname);
				
				setm = getMethod(obj, setname);
				if(setm == null){
					return false; //not found
				}
				Class[] params = setm.getParameterTypes();
				if(params ==null || params.length!=1){
					return false; //参数不匹配
				}
				String ptype = params[0].getSimpleName();
				//System.out.println("ptype is "+ptype);
				setm.invoke(obj, transType(val,ptype));
			}
			return true;
		} catch (Exception e) {
			Log.d(e);
		}
		return false;
	}
	private static Object transType(Object obj,String toType){
		if(obj == null)return null;
		
		
		String sval = obj.toString();
		if(toType.equals("String")){
			return sval;
		}
		if(toType.equals("int") || toType.equals("Integer")){
			return Integer.parseInt(sval);
		}
		toType = toType.toLowerCase();
		if(toType.equals("long") ){
			return Long.parseLong(sval);
		}
		if(toType.equals("float")){
			return Float.parseFloat(sval);
		}
		if(toType.equals("double")){
			return Double.parseDouble(sval);
		}
		if(toType.equals("boolean") || toType.equals("java.lang.Boolean")){
			return Boolean.parseBoolean(sval);
		}
		
		return obj; //unknown ,return orignal
		
	}
	public static void prop2StaticField(Properties prop,Class clz){
		Field[] fa = clz.getFields();
		for(Field f :fa){
			String name = f.getName();
			String val = prop.getProperty(name);
			try {
				Object ov = transType(val,f.getType().getName());
				if(ov == null)continue;
				f.set(null,ov );
				Log.d("set "+clz.getName()+" field "+name +" to "+val);
			} catch (Exception e) {
				Log.d(e);
			}
		}
		//Log.i(Config.str());
		
	}

}