easyui入门

什么是easyui！

easyui=jquery+html4（用来做后台的管理界面）

1、通过layout布局

我们先把该导的包导下

然后就是JSP页面布局

2、通过tree加载菜单

先来一个实体类

public class TreeNode {
  private String id;
  private String text;
  private  List<TreeNode> children=new ArrayList<TreeNode>();
  private  Map<String, Object> attributes=new HashMap<String, Object>();
public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getText() {
    return text;
}
public void setText(String text) {
    this.text = text;
}
public List<TreeNode> getChildren() {
    return children;
}
public void setChildren(List<TreeNode> children) {
    this.children = children;
}
public Map<String, Object> getAttributes() {
    return attributes;
}
public void setAttributes(Map<String, Object> attributes) {
    this.attributes = attributes;
}
@Override
public String toString() {
    return "TreeNode [id=" + id + ", text=" + text + ", children=" + children + ", attributes=" + attributes + "]";
}

}

然后就是DAO方法了

public class MenuDao extends JsonBaseDao {
    /**
     * 给前台tree_data1_json的字符串
     * @param paMap 从前台jsp传递过来的参数集合
     * @param pageBean
     * @return
     * @throws SQLException
     * @throws IllegalAccessException
     * @throws InstantiationException
     */
    public List<TreeNode> listTreeNode(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
       List<Map<String, Object>> listMap = this.listMap(paMap, pageBean);
       List<TreeNode> listTreeNode=new ArrayList<TreeNode>();
       this.listMapToListTreeNode(listMap, listTreeNode);
       return listTreeNode;
    }

    public List<Map<String, Object>> listMap(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
        String sql="select * from t_easyui_menu where true";
        String menuId=JsonUtils.getParamVal(paMap, "Menuid");
        if(StringUtils.isNotBlank(menuId)) {
            sql+=" and parentid="+menuId;
        }
        else {
            sql+=" and parentid=-1";
        }
        //这里面存放的是数据库中的菜单信息
      List<Map<String, Object>> listMap = super.executeQuery(sql, pageBean);
         return listMap;
     }
    /**
     * {'Menuid':001,'Menuame':'学生管理'}
     * -->
     * {id:..,text:...}
     * @param map
     * @param treeNode
     * @throws SQLException
     * @throws IllegalAccessException
     * @throws InstantiationException
     */
    private void MapToTreeNode(Map<String, Object> map,TreeNode treeNode) throws InstantiationException, IllegalAccessException, SQLException {
        treeNode.setId(map.get("Menuid")+"");
        treeNode.setText(map.get("Menuname")+"");
        treeNode.setAttributes(map);

        //将子节点添加到父节点当中，建立数据之间的父子关系
        //treeNode.setChildren(children);
        Map<String, String[]> childrenMap=new HashMap<>();
        childrenMap.put("Menuid", new String[]{treeNode.getId()});
        List<Map<String, Object>> listMap = this.listMap(childrenMap, null);
        List<TreeNode>listTreeNode=new ArrayList<>();
        this.listMapToListTreeNode(listMap, listTreeNode);
        treeNode.setChildren(listTreeNode);
    }
    /**
     * [{'Menuid':001,'Menuame':'学生管理'}'Menuid':002,'Menuame':'后勤管理'}]
     * @param listMap
     * tree_data1_json
     * @param listTreeNode
     * @throws SQLException
     * @throws IllegalAccessException
     * @throws InstantiationException
     */
    private void listMapToListTreeNode (List<Map<String, Object>> listMap,List<TreeNode> listTreeNode) throws InstantiationException, IllegalAccessException, SQLException{
        TreeNode treeNode=null;
        for (Map<String, Object> map : listMap) {
            treeNode=new TreeNode();
            MapToTreeNode(map, treeNode);
            listTreeNode.add(treeNode);
        }
    }
}

web层MenuAction

public class MenuAction extends ActionSupport{

    private MenuDao menuDao=new MenuDao();

    public String menuTree(HttpServletRequest request,HttpServletResponse response) throws Exception {
        ObjectMapper om=new ObjectMapper();
        //获取到 easyui所识别的json格式
        List<TreeNode> listTreeNode = this.menuDao.listTreeNode(request.getParameterMap(), null);
         ResponseUtil.write(response, om.writeValueAsString(listTreeNode));
       return null;

    }                         

}

然后是mvc.xml配置

     <action path="/menuAction" type="com.web.MenuAction">
        <forward name="index" path="/index.jsp" redirect="false" />
    </action>

还有一个就是外部JS文件

$(function(){
    $('#tt').tree({
        url:'menuAction.action?methodName=menuTree', 

    });  

})

效果图

web.xml的配置

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app id="WebApp_ID" version="3.1" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<display-name>easyui01</display-name>
<filter>
<filter-name>encodingFiter</filter-name>
<filter-class>com.util.EncodingFiter</filter-class>
</filter>
<filter-mapping>
<filter-name>encodingFiter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>actionServlet</servlet-name>
<servlet-class>com.framework.ActionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>actionServlet</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>

3、通过菜单去打开不同的tab页

这个只要在外部JS里面加些内容就可以了

$(function(){
    $('#tt').tree({
        url:'menuAction.action?methodName=menuTree',
        onClick:function(node){

            // add a new tab panel
            var content = '<iframe scrolling="no" frameborder="0" src="'+node.attributes.menuUrL+'" width="99%" height="99%"></iframe>';
            if($('#menutab').tabs('exists',node.text)){
                //存在执行选中已有选项卡操作
                $('#menutab').tabs('select',node.text);
            }else{
                //不存在执行新增
                $('#menutab').tabs('add',{
                    title:node.text,
                    content:content,
                    closable:true,
                });
            }
        }
    });  

})

效果