sprng mvc3 日期自动绑定(转)

本文详细介绍了在使用Spring MVC时遇到将页面参数绑定到包含Date属性的对象时出现的问题,并提供了一个解决方案,通过自定义DateEditor类来处理Date类型转换,确保页面参数正确绑定。

原文  http://blog.youkuaiyun.com/whumr1/article/details/8056285

 

使用spring的mvc,直接将页面参数绑定到对象中,对象中有属性为Date时会报错,此时需要处理下。

同样的,其他的需要处理的类型也可以用这种方法。

在controller中加入代码

 

@InitBinder
protected void initBinder(HttpServletRequest request,
                              ServletRequestDataBinder binder) throws Exception {
    //对于需要转换为Date类型的属性,使用DateEditor进行处理
    binder.registerCustomEditor(Date.class, new DateEditor());
}

 

 

 

DateEditor为自定义的处理类,继承自PropertyEditorSupport,处理方法为public void setAsText(String text) throws IllegalArgumentException

 

import org.springframework.util.StringUtils;

import java.beans.PropertyEditorSupport;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateEditor extends PropertyEditorSupport {

    private static final DateFormat DATEFORMAT = new SimpleDateFormat("yyyy-MM-dd");
    private static final DateFormat TIMEFORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    private DateFormat dateFormat;
    private boolean allowEmpty = true;

    public DateEditor() {
    }

    public DateEditor(DateFormat dateFormat) {
        this.dateFormat = dateFormat;
    }

    public DateEditor(DateFormat dateFormat, boolean allowEmpty) {
        this.dateFormat = dateFormat;
        this.allowEmpty = allowEmpty;
    }

    /**
     * Parse the Date from the given text, using the specified DateFormat.
     */
    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        if (this.allowEmpty && !StringUtils.hasText(text)) {
            // Treat empty String as null value.
            setValue(null);
        } else {
            try {
                if(this.dateFormat != null)
                    setValue(this.dateFormat.parse(text));
                else {
                    if(text.contains(":"))
                        setValue(TIMEFORMAT.parse(text));
                    else
                        setValue(DATEFORMAT.parse(text));
                }
            } catch (ParseException ex) {
                throw new IllegalArgumentException("Could not parse date: " + ex.getMessage(), ex);
            }
        }
    }

    /**
     * Format the Date as String, using the specified DateFormat.
     */
    @Override
    public String getAsText() {
        Date value = (Date) getValue();
        DateFormat dateFormat = this.dateFormat;
        if(dateFormat == null)
            dateFormat = TIMEFORMAT;
        return (value != null ? dateFormat.format(value) : "");
    }
}

# ???? WEB ???? server.port=7090 server.servlet.context-path=/api #session???? 60M ???? server.servlet.session.timeout=PT60M #??favicon spring.mvc.favicon.enable=false #???? spring.mvc.throw-exception-if-no-handler-found=true spring.web.resources.add-mappings=false spring.servlet.multipart.max-file-size=20MB spring.servlet.multipart.max-request-size=20MB #数据库设置 spring.datasource.url=jdbc:mysql://118.24.147.138:3306/wangpan?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true spring.datasource.username=wangpan spring.datasource.password=rootroot spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.hikari.pool-name=HikariCPDatasource spring.datasource.hikari.minimum-idle=5 spring.datasource.hikari.idle-timeout=180000 spring.datasource.hikari.maximum-pool-size=10 spring.datasource.hikari.auto-commit=true spring.datasource.hikari.max-lifetime=1800000 spring.datasource.hikari.connection-timeout=30000 spring.datasource.hikari.connection-test-query=SELECT 1 #???????? # ?????????? smtp.qq.com spring.mail.host=smtp.qq.com # ??????? spring.mail.port=465 # ??? spring.mail.username=3824245251@qq.com # spring.mail.password=ehcyxusufuulccah # ???? spring.mail.default-encoding=UTF-8 # SSL???? spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory # ?? debug???????????????? spring.mail.properties.mail.debug=true #?????? #Spring redis?? # Redis?????????0? spring.redis.database=0 spring.redis.host=118.24.147.138 spring.redis.port=6379 # ???????????????????? spring.redis.jedis.pool.max-active=20 # ??????????????????????? spring.redis.jedis.pool.max-wait=-1 # ??????????? spring.redis.jedis.pool.max-idle=10 # ??????????? spring.redis.jedis.pool.min-idle=0 # ?????????? spring.redis.timeout=2000 #项目目录 project.folder=/www/wangpan/ # log.root.level=debug #内部端口 inner.api.appKey=wangpan inner.api.appSecret=wangpan_key #web端口 web.api.url=http://118.24.147.138:7090 #管理员id admin.emails=961285867@qq.com #是否是开发环境 dev=false ##qq????## qq.app.id=12333 qq.app.key=2222222 qq.url.authorization=https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id=%s&redirect_uri=%s&state=%s qq.url.access.token=https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&client_id=%s&client_secret=%s&code=%s&redirect_uri=%s qq.url.openid=https://graph.qq.com/oauth2.0/me?access_token=%S qq.url.user.info=https://graph.qq.com/user/get_user_info?access_token=%s&oauth_consumer_key=%s&openid=%s qq.url.redirect=http://wangpan.wuhancoder.com/qqlogincalback springboot的配置文件,部署到服务器上,有什么错误吗
最新发布
05-13
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