SpringMVC3.2 解决PO返回前台转成JSON时数据Long精度丢失问题

SpringMVC3.2  解决PO返回前台转成JSON时数据Long精度丢失问题

方案

1、自定义一个杰克逊的json转换类

public class LongToStringAdapter extends ObjectMapper {

    private static final long serialVersionUID = 4402127997078513582L;  

    public LongToStringAdapter() {
        super();
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        this.registerModule(simpleModule);
    }
}

2、配置到springmvc文件中即可

  <mvc:annotation-driven  conversion-service="conversionService">
        <mvc:message-converters>
           <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
               <property name="objectMapper">
                    <!-- <bean class="com.fasterxml.jackson.databind.ObjectMapper">   -->
                    <bean class="mypackage.LongToStringAdapter">
                        <property name="dateFormat">
                            <bean class="java.text.SimpleDateFormat">
                                <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />
                            </bean>
                        </property>
                    </bean>
               </property>
           </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>