java实现遍历树形菜单两种实现代码分享
文本主要向大家分享了java实现遍历树形菜单的实例代码,具体如下。
OpenSessionView实现:
package org.web; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import org.dao.BaseHibernateDao; import org.hibernate.Hibernate; import org.hibernate.Session; import org.hibernate.Transaction; public class OpenSessionView extends BaseHibernateDao implements Filter { /**(非 Javadoc) * <p>Title: destroy</p> * <p>Description(描述): </p> * @see javax.servlet.Filter#destroy() */ @Override public void destroy() { // TODO Auto-generated method stub } /**(非 Javadoc) * <p>Title: doFilter</p> * <p>Description(描述): </p> * @param arg0 * @param arg1 * @param arg2 * @throws IOException * @throws ServletException * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain) */ @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { Session session = null; Transaction tx = null; try { session = getSession(); tx = session.beginTransaction(); arg2.doFilter(arg0, arg1); tx.commit(); } catch (Exception e) { e.printStackTrace(); tx.rollback(); } finally{ closeSession(); } } /**(非 Javadoc) * <p>Title: init</p> * <p>Description(描述): </p> * @param arg0 * @throws ServletException * @see javax.servlet.Filter#init(javax.servlet.FilterConfig) */ @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } }
TreeAction实现
package org.web; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import org.Service.IVoteTreeService; import org.Service.impl.VoteTreeServiceImpl; import com.alibaba.fastjson.JSON; import com.opensymphony.xwork2.ActionSupport; public class TreeAction extends ActionSupport { private JSONArray treejson; private IVoteTreeService voteService = new VoteTreeServiceImpl(); public String getTree(){ treejson = voteService.getTreeJson(); return SUCCESS; } public JSONArray getTreejson() { return treejson; } public void setTreejson(JSONArray treejson) { this.treejson = treejson; } }
总结
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