为简化和统一,需要给javabean实例统一赋值,实现代码如下(已测试)
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import com.xxx.entity.Call;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class ReflectUtils {
@SuppressWarnings("rawtypes")
public static Map<String,Class> getPoJoFiled(Class cls){
Map<String,Class> names=new HashMap<>();
Field[] fileds=cls.getDeclaredFields();
for(Field filed:fileds){
names.put(filed.getName(), filed.getType());
}
return names;
}
@SuppressWarnings("rawtypes")
public static List<String> getSetMethodName(Class cls){
List<String> methodNames=new ArrayList<>();
Method[] methods =cls.getDeclaredMethods();
for(Method method:methods){
if(method.getName().startsWith("set")){
methodNames.add(method.getName());
}
}
return methodNames;
}
private static String getMethodNameByField(List<String> methodNames, String filedName) {
for (String method : methodNames) {
if (method.toLowerCase().equalsIgnoreCase("set" + filedName)) {
return method;
}
}
return "";
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public static void initInstance(Object instance,String param) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException{
Class cls=instance.getClass();
Map<String,Class> fieldNames=ReflectUtils.getPoJoFiled(cls);
List<String> methodNames=ReflectUtils.getSetMethodName(cls);
for(Entry<String,Class> field:fieldNames.entrySet()){
String filedName=field.getKey();
String methodName=getMethodNameByField(methodNames,filedName);
Method setMethodName = cls.getMethod(methodName, fieldNames.get(filedName));
String type=fieldNames.get(filedName).getName();
if(type.equals("java.lang.String")) {
setMethodName.invoke(instance, new Object[] {param});
}
else if(type.equals("int") || type.equals("java.lang.Integer")) {
setMethodName.invoke(instance, new Object[] {new Integer(param)});
}
else if(type.equals("long") || type.equals("java.lang.Long")) {
setMethodName.invoke(instance, new Object[] {new Long(param)});
}else if (type.equals("float") || type.equals("java.lang.Float")) {
setMethodName.invoke(instance, new Object[]{new Float(param)});
} else if(type.equals("boolean") || type.equals("java.lang.Boolean")) {
setMethodName.invoke(instance, new Object[] { Boolean.valueOf(param) });
}
else if(type.equals("java.util.Date")) {
Date date = DateUtil.parseDateTime(param);
if(date!=null)
setMethodName.invoke(instance, new Object[] {date});
}
}
}
public static void main(String[] args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
String param="20";
Call call=new Call();
initInstance(call,param);
System.out.println(call.toString());
}
需要用到的公共类:
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class DateUtil {
/**
* 得到当前的时间,自定义时间格式 y 年 M 月 d 日 H 时 m 分 s 秒
* @param dateFormat 输出显示的时间格式
* @return
*/
public final static String defaultFormat = "yyyy-MM-dd HH:mm:ss";
public static String getCurrentDate(String dateFormat) {
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
return sdf.format(new Date());
}
public static Date parseDateTime(String date){
SimpleDateFormat formatter = new SimpleDateFormat(defaultFormat);
Date newDate = null;
try {
newDate = formatter.parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
return newDate;
}
}