springmvc post请求400

待我称王封你为后i 2022-05-29 10:14 200阅读 0赞

我有一个这样的Bean

控制层

@RequestMapping(value = "add", method = RequestMethod.POST)
        public void add(TestBean bean){
            System.out.println(bean);
        }

表单请求add方法报400错误， 百度之后看了这里[http://blog.csdn.net/u014079773/article/details/51865178][http_blog.csdn.net_u014079773_article_details_51865178]， 说字段有Date类型就会失败。所以将Bean改成如下。在setter上转成Date

public class TestBean {
        private  String name;
        private Date date;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public Date getDate() {
            return date;
        }
    
        public void setDate(String date) {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            try {
                this.date = sdf.parse(date);
            } catch (ParseException e) {
                e.printStackTrace();
            }
        }
    }

看了别人项目是怎么处理Date类型属性的，不用修改setter方法，解决办法如下。  
在spring-mvc.xml中配置：

<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
        
        <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
            
            <property name="converters">
                <set>
                    <bean class="com.stu_plus.controller.CustomDateConverter"/>
                </set>
            </property>
        </bean>

在com.stu\_plus.controller包下创建CustomDateConverter类实现Converter接口即可。

public class CustomDateConverter implements Converter<String, Date> { 
    
        public Date convert(String s) {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            try {
                return simpleDateFormat.parse(s);
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return null;
        }
    }

[http_blog.csdn.net_u014079773_article_details_51865178]: http://blog.csdn.net/u014079773/article/details/51865178