java map转对象工具类

不念不忘少年蓝@ 2024-03-23 14:55 162阅读 0赞

/**
     * @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());
        }
    }