通过将Spring MVC与AJAX/JSON和MappingJackson一起使用来实现LazyInitializationException

@RequestMapping("/entity/{id}")
@ResponseBody
public Entity getEntity(@PathVariable("id") Long id) {
    Entity entity = entityService.getEntityById(id);
    return entity;
}

$.ajax({
    url: "/entity/1",
    dataType: "json",
    success: function(data) {
        // 处理返回的实体对象
    }
});

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="objectMapper">
                <bean class="com.fasterxml.jackson.databind.ObjectMapper">
                    <property name="serializationInclusion" value="NON_NULL" />
                </bean>
            </property>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>