com.lodsve.boot.component.webmvc.convert.StringDateConvertFactory Maven / Gradle / Ivy

Go to download
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.lodsve.boot.component.webmvc.convert;

import org.apache.commons.lang3.StringUtils;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.ConditionalConverter;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Pattern;

/**
 * 时间类型转换器.
 *
 * @author sunhao([email protected])
 * @date 2014-12-18 15:28
 */
@SuppressWarnings({"all"})
public class StringDateConvertFactory implements ConverterFactory, ConditionalConverter {
    /**
     * yyyy-MM-dd hh:mm
     */
    private static final Pattern PATTERN_ONE = Pattern.compile("(\\d){2,4}[-](\\d){1,2}[-](\\d){1,2} (\\d){1,2}[:](\\d){1,2}");
    /**
     * yyyy-MM-dd
     */
    private static final Pattern PATTERN_TWO = Pattern.compile("(\\d){2,4}[-](\\d){1,2}[-](\\d){1,2}");
    /**
     * hh:mm yyyy-MM-dd
     */
    private static final Pattern PATTERN_THREE = Pattern.compile("(\\d){1,2}[:](\\d){1,2} (\\d){2,4}[-](\\d){1,2}[-](\\d){1,2}");
    /**
     * yyyy-MM-dd hh:mm:ss
     */
    private static final Pattern PATTERN_FOUR = Pattern.compile("(\\d){2,4}[-](\\d){1,2}[-](\\d){1,2} (\\d){1,2}[:](\\d){1,2}[:](\\d){1,2}");


    @Override
    public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
        Class clazz = targetType.getType();
        return Date.class.isAssignableFrom(clazz);
    }

    @Override
    @SuppressWarnings("unchecked")
    public  Converter getConverter(Class targetType) {
        return new String2Date();
    }

    private class String2Date implements Converter {
        @Override
        public Date convert(String source) {
            try {
                String pattern = getDateFormatPattern(source);
                DateFormat df = new SimpleDateFormat(pattern);

                return df.parse(source);
            } catch (ParseException e) {
                e.printStackTrace();
            }

            return null;
        }

        /**
         * get date format pattern for what parameter in request
         *
         * @param source
         * @return
         */
        private String getDateFormatPattern(String source) {
            if (StringUtils.isEmpty(source)) {
                return "yyyy-MM-dd HH:mm";
            }

            if (PATTERN_ONE.matcher(source).matches()) {
                return "yyyy-MM-dd HH:mm";
            }
            if (PATTERN_TWO.matcher(source).matches()) {
                return "yyyy-MM-dd";
            }
            if (PATTERN_THREE.matcher(source).matches()) {
                return "HH:mm yyyy-MM-dd";
            }
            if (PATTERN_FOUR.matcher(source).matches()) {
                return "yyyy-MM-dd HH:mm:ss";
            }

            return "yyyy-MM-dd HH:mm";
        }
    }
}