jquery中EasyUI实现异步树
前台使用EasyUI实现.EasyUI向后台传递一个id参数.
第一次加载,向后台传递的id为null.
之后每次将树节点展开,会向后台传递一个当前节点的id.
Control层:
/**
*tree
*/
@RequestMapping(value="/tree.do")
publicvoidmytree(HttpServletResponseresponse,Stringid){
this.writeJson(response,bookService.getChildrenTree(id));
}
Service层:
@Transactional
@Override
publicList<Tree>getChildrenTree(Stringpid){
try{
List<Tree>result=newArrayList<Tree>();
//获得儿子节点的列表
List<TBookType>childrenList=this.getChildrenType(pid);
if(childrenList!=null&&childrenList.size()>0){
for(TBookTypechild:childrenList){
//获取孙子的个数
longcount=bookDao.getChildrenCount(String.valueOf(child.getId()));
Treenode=newTree();
node.setId(String.valueOf(child.getId()));
node.setPid(String.valueOf(child.getPid()));
node.setText(child.getName());
node.setChildren(null);
node.setState(count>0?"closed":"open");
//将儿子列表childrenList数据逐个存到树当中
result.add(node);
}
}
returnresult;
}catch(Exceptione){
thrownewBusinessException("获取图书类型数据出现错误！",e);
}
}
Dao层:
@Override
publicList<TBookType>getChildrenType(Stringpid){
//这个的pid就是当前展开节点的id,通过父节点的id来获得子节点
StringBuildersqlstr=newStringBuilder();
if(StringUtils.isBlank(pid))
sqlstr.append("select*frombooktypebtwherebt.pid=0");
else
sqlstr.append("select*frombooktypebtwherebt.pid="+pid);
returnthis.search2(TBookType.class,sqlstr.toString());
}
@Override
publiclonggetChildrenCount(Stringpid){
//这个的pid就是当前展开节点的id,通过父节点的id来获得子节点的个数
StringBuildersqlstr=newStringBuilder();
if(StringUtils.isBlank(pid))
sqlstr.append("selectcount(*)frombooktypetbwheretb.pid='0'");
else
sqlstr.append("selectcount(*)frombooktypetbwheretb.pid='"+pid+"'");
returnthis.count(sqlstr.toString());
}
以上所述就是本文关于EasyUI实现异步树的全部代码了，希望对大家能有所帮助