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  • easyui使用数据库数据展示导航标题：idea

    客户端jsp网页：
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    <!-- 西部layout  -->
    <div data-options="region:'west',split:true,title:'功能管理'" style="150px;">
     
        <!-- tree导航  -->
        <ul id="tt"></ul>
     
    </div>

    js部分：发送请求：

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    /**
         *   tree的设置
         *
         **/
     
        $("#tt").tree({
            url: "getTreeTitles",
            lines: true
     
     
        });

    创建实体类，重要：理解

    下面用pid表示层级之间的管理，默认是0，表示顶级，其次是子级（填写父级的id ）   

    然后，搜索pid，返回一个list集合，然后再返回json。

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    package com.domain;
     
    import javax.persistence.*;
    import java.io.Serializable;
     
     
    @Table(name = "ooo_navigation")
    @Entity
    public class Navigation implements Serializable {
     
        private Integer id;
        private String text;
        private String state;
        private String iconCls;
        private String url;
        private Integer pid;
     
     
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Id
        public Integer getId() {
            return id;
        }
     
        public void setId(Integer id) {
            this.id = id;
        }
     
     
        @Column(nullable = true, length = 25)
        public String getText() {
            return text;
        }
     
        public void setText(String text) {
            this.text = text;
        }
     
        @Column(length = 25)
        public String getState() {
            return state;
        }
     
        public void setState(String state) {
            this.state = state;
        }
     
        public String getIconCls() {
            return iconCls;
        }
     
        public void setIconCls(String iconCls) {
            this.iconCls = iconCls;
        }
     
     
        @Column(length = 50)
        public String getUrl() {
            return url;
        }
     
        public void setUrl(String url) {
            this.url = url;
        }
     
        @Column(columnDefinition = "int default 0")
        public Integer getPid() {
            return pid;
        }
     
        public void setPid(Integer pid) {
            this.pid = pid;
        }
     
        public Navigation() {
        }
     
        public Navigation(Integer id, String text, String state, String iconCls, String url, Integer pid) {
            this.id = id;
            this.text = text;
            this.state = state;
            this.iconCls = iconCls;
            this.url = url;
            this.pid = pid;
        }
     
        @Override
        public String toString() {
            return "Navigation{" +
                "id=" + id +
                ", text='" + text + ''' +
                ", state='" + state + ''' +
                ", iconCls='" + iconCls + ''' +
                ", url='" + url + ''' +
                ", pid=" + pid +
                '}';
        }
    }

    用jpa生成数据库后，在数据库填写数据......closed表示父级显示+号，可以展开，展开的时候，tree就把子级的pid以“id”作为请求参数进行再次请求数据，表示请求该父级下的数据       

        


    请求方法，可以判断接收id值，默认为0，返回list，这里使用了json的jar包自动转换....

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    /**
         * 获取导航栏标题
         **/
        @ResponseBody
        @RequestMapping(value = "getTreeTitles", method = RequestMethod.POST)
        public List<Navigation> getTreeTitles(@RequestParam(value = "id", required = false, defaultValue = "0") Integer id) {
     
            List<Navigation> list = userTransaction.getTrees(id);
     
            System.out.println(list);
     
            return list;
        }

      json的jar包：



    springData的查询方法：

    显示效果：

    控制台语句：

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    Hibernate:
        select
            navigation0_.id as id1_0_,
            navigation0_.iconCls as iconCls2_0_,
            navigation0_.pid as pid3_0_,
            navigation0_.state as state4_0_,
            navigation0_.text as text5_0_,
            navigation0_.url as url6_0_
        from
            ooo_navigation navigation0_
        where
            navigation0_.pid=?
    [Navigation{id=1, text='数据库模块', state='closed', iconCls='null', url='null', pid=0}, Navigation{id=2, text='人员管理模块', state='closed', iconCls='null', url='null', pid=0}]

    点击+号：

     


    语句：

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    Hibernate:
        select
            navigation0_.id as id1_0_,
            navigation0_.iconCls as iconCls2_0_,
            navigation0_.pid as pid3_0_,
            navigation0_.state as state4_0_,
            navigation0_.text as text5_0_,
            navigation0_.url as url6_0_
        from
            ooo_navigation navigation0_
        where
            navigation0_.pid=?
    [Navigation{id=3, text='采购信息', state='open', iconCls='null', url='null', pid=1}, Navigation{id=4, text='学生成绩', state='open', iconCls='null', url='null', pid=1}]



     
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  • 原文地址：https://www.cnblogs.com/share2015/p/5401273.html
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