运用了mybatis
1、Service层
public Blog getAfterBlog(Integer blogId) {BlogExample blogExample = new BlogExample();BlogExample.Criteria criteria = blogExample.createCriteria();criteria.andBlogIdGreaterThan(blogId);Blog blog = new Blog();if(blogMapper.selectByExample(blogExample).size() > 0 ){blog = blogMapper.selectByExample(blogExample).get(0);}else{blog.setTitle("这是最后一篇文章");blog.setBlogId(blogId);}return blog;}
2、Service层
@Overridepublic Blog getPreBlog(Integer blogId) {BlogExample blogExample = new BlogExample();BlogExample.Criteria criteria = blogExample.createCriteria();criteria.andBlogIdLessThan(blogId);Blog blog = new Blog();if(blogMapper.selectByExample(blogExample).size() > 0 ){blog = blogMapper.selectByExample(blogExample).get(0);}else{blog.setTitle("这是第一篇文章");blog.setBlogId(blogId);}return blog;}
3、Controller层
@RequestMapping(value="/view")public ModelAndView viewBlog(@RequestParam("blogId") Integer blogId){// log.debug("In viewBlog, blogID={}", blogId);Blog blog = blogServiceImpl.getBlogById(blogId);Blog blogPre = blogServiceImpl.getPreBlog(blogId);Blog blogAfter = blogServiceImpl.getAfterBlog(blogId);ModelAndView mav = new ModelAndView("blog_view");mav.addObject("blog",blog);mav.addObject("blogPre",blogPre);mav.addObject("blogAfter",blogAfter);return mav;}
4、前端
<div class="last-next"><div><a href="${pageContext.request.contextPath}/blog/view?blogId=${blogPre.blogId}" title="上一篇"><i class="icon-double-angle-left"></i>${blogPre.title}</a></div><div><a href="${pageContext.request.contextPath}/blog/view?blogId=${blogAfter.blogId}" title="下一篇"><i class="icon-double-angle-right"></i>${blogAfter.title}</a></div></div>
