java map转对象工具类-蒲公英云

java map转对象工具类

/**
 * @Class BeanUtils 
 * @Author: zhaoc
 * @Version 1.0
 * @Date: 2019-07-22
 * @Description 类说明
 **/
public class BeanUtils {
    /****
     * Map转Java对象
     * @param paramMap
     * @param clazz
     * @return
     * @throws Exception
     */
    public static Object copyMapToObject(Map<String, Object> paramMap, Class clazz) throws Exception {
        Object object = clazz.newInstance();
        Field[] fields = clazz.getDeclaredFields();
        if(fields != null && fields.length > 0) {
            for(Field field : fields) {
                String fieldName = field.getName();
                String mapVal = StringHandler.getRequestStr(paramMap.get(fieldName));
                if(mapVal != null) {
                    Object paramVal = null;
                    String fieldType = field.getType().getSimpleName();
                    if("Long".equals(fieldType)) {
                        paramVal = Long.valueOf(mapVal);
                    } else if("Integer".equals(fieldType)) {
                        paramVal = Integer.parseInt(mapVal);
                    } else if("BigDecimal".equals(fieldType)) {
                        paramVal = new BigDecimal(mapVal);
                    } else if("Date".equals(fieldType)) {
                        paramVal = DateUtils.parseDate(mapVal);
                    } else {
                        paramVal = mapVal;
                    }
                    ClassInvokeUtil.setFieldValue(object, fieldName, paramVal);
                }
            }
        }
        return object;
    }
}
/**
 * @Class ClassInvokeUtil
 * @Author: zhaoc
 * @Version 1.0
 * @Date: 2019-07-22
 * @Description 类说明
 **/
public class ClassInvokeUtil {
    public static void setFieldValue(Object obj, String fieldName, Object value) throws Exception {
        String methodName = "set" + upperFirst(fieldName);
        Method method = getTargetMethod(obj, methodName);
        Object[] paramObj = {value};
        method.invoke(obj, paramObj);
    }
    private static Method getTargetMethod(Object object, String methodName) {
        Class clazz = object.getClass();
        Method[] methods = clazz.getMethods();
        for (int i = 0; i < methods.length; i++) {
            if (methodName.equals(methods[i].getName())) {
                return methods[i];
            }
        }
        throw new RuntimeException("Invalid target method " + methodName
                + " In Class " + object);
    }
    private static String upperFirst(String name) {
        return name.substring(0,1).toUpperCase() +
                name.substring(1, name.length());
    }
}