Spring mvc 日期轉換 支持多種格式

須要maven, spring 版本 4.2.5.RELEASEjava

<dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.4</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.jaxrs</groupId>
      <artifactId>jackson-jaxrs-base</artifactId>
      <version>2.7.3</version>
</dependency>

mvc 數據綁定, 從字符串Datespring

import java.text.ParseException;
import java.util.Collection;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.springframework.core.convert.converter.Converter;

public final class StringToDate implements Converter<String, Date>{
    private final Set<String> patterns;
    
    public StringToDate(){
        patterns = new HashSet<>();
        patterns.add("yyyy-MM-dd HH:mm:ss");
    }
    @Override
    public Date convert(String source) {
        if(StringUtils.isBlank(source))
            return null;
        Date parseDate = null;
        try {
            parseDate = DateUtils.parseDate(source, patterns.toArray(new String[]{}));
        } catch (ParseException e) {
            throw new IllegalArgumentException(e.getCause());
        }

        return parseDate;
    }
    /**
     * 自定義轉換 默認有
     * {@code yyyy-MM-dd HH:mm:ss}
     * @param patterns
     */
    public void setPatterns(Collection<String> patterns) {
        this.patterns.addAll(patterns);
    }
    
}

spring mvc 配置文件apache

<mvc:annotation-driven conversion-service="conversionService">
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper">
                    <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"
                          p:indentOutput="true"
                          p:simpleDateFormat="yyyy-MM-dd HH:mm:ss">
                     </bean>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>
    <!-- 類型轉換 -->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="com.xx.support.StringToDate">
                    <property name="patterns">
                        <set>
                            <value><![CDATA[yyyy/MM/dd HH:mm:ss]]></value>
                        </set>
                    </property>
                </bean>
            </set>
        </property>
    </bean>

附:額外未完成工做json

    想使用jackson  json to Object, 日期也支持多種格式匹配mvc

import java.io.IOException;
import java.text.ParseException;
import java.util.Date;

import org.apache.commons.lang3.time.DateUtils;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

public class JsonDateDeserialize extends JsonDeserializer<Date> {
    private String[] patterns = {"yyyy-MM-dd HH:mm:ss","yyyy/MM/dd HH:m:ss"};

    public Date deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
        String dateAsString = jp.getText();
        Date parseDate = null;
        try {
            parseDate = DateUtils.parseDate(dateAsString, patterns);
        } catch (ParseException e) {
            throw new IllegalArgumentException(e.getCause());
        }

        return parseDate;
    }
}

發現須要得到 ObjectMapper
app

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addDeserializer(Date.class, new JsonDateDeserialize ());
mapper.registerModule(module);
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