【SpringBoot】在HTML中调用Spring Bean

前言

• spring boot : 2.0.0.RELEASE
• maven
• eclipse
• thymeleaf 3.0
• 某些情况下需要在HTML中调用Service。比如：做CMS系统时提供的随时获取文章的功能。

解决办法

使用thymeleaf提供的调用Spring Bean的方法。

Access any beans in your application context using SpringEL’s syntax: ${@myBean.doSomething()}

注：很贴心的功能啊。

实操

编写Bean

这里不赘述了。确定好要编写什么样的bean，编写即可。

package myabc.weicms.fn.content;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
import org.springframework.stereotype.Service;
import myabc.weicms.dao.ChannelEntity;
import myabc.weicms.dao.ChannelEntityRespository;

@Service("viewBean4Channel")
public class ChannelService {
    @Autowired
    ChannelEntityRespository channelEntityRespository;

    @Override
    public String toString() {
        return "My Name Is ChannelService! Bean Name Is viewBean4Channel!";
    }

    /* 这里查询了数据库。但是关注点不要放在查询数据库上。
    */
    public List<ChannelEntity> getChannel() {
        Pageable pageable = PageRequest.of(0, 10, Sort.by(Direction.ASC, "id"));
        Page<ChannelEntity> pageData = this.channelEntityRespository.findAll(pageable);
        return pageData.getContent();
    }
}

HTML中调用Spring Bean

    <h1>welcome by thymeleaf</h1>
    <br />
    <ul>
        <li th:text="${@viewBean4Content}">显示点儿什么</li>
    </ul>
    <br />
    <h3>栏目列表</h3>
    <table class="layui-table">
        <tbody>
            <tr th:each="row : ${@viewBean4Channel.getChannel()}">
                <td th:text="${row.id}">1</td>
                <td th:text="${row.name}">title</td>
            </tr>
        </tbody>
    </table>

运行结果