layui与java后台交互

layui是现在比较火的一个前端设计框架，下面介绍一下它的数据分页及其与java后台的交互。

一、返回的Json格式

按照layui官网给的示例，自己封装了工具类

public class LayuiReplay  {
    private int code;
    private String msg;
    private int count;
    private List data;

    public LayuiReplay(int code, String msg, int count, List data) {
        this.code = code;
        this.msg = msg;
        this.count = count;
        this.data = data;
    }

    public String toJson() {
        Gson gson = new Gson();
        String json = gson.toJson(this);
        return json;
    }

    public static  String toJson(int count, List data) {
        LayuiReplay replay = new LayuiReplay<>(ReplyCode.OK.getCode(), ReplyCode.OK.getMessage(), count, data);
        return replay.toJson();
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public List getData() {
        return data;
    }

    public void setData(List data) {
        this.data = data;
    }
}

二、前台代码

$(function() {
	/*社区用户数据分页显示*/
	layui.use('table', function() {
		var table = layui.table;

		table.render({
			elem: '#user_info_manager',
			height: 'full-50',
			url: 'http://localhost:9901/user/getAllUserInfo',
			page: true ,
			loading: true,
			text: {
				none: '暂无相关数据'
			},
			cellMinWidth: 80,
			cols: [
				[{
					field: 'username',
					width: '10%',
					title: '用户名',
					sort: true
				}, {
					field: 'nickname',
					width: '10%',
					title: '昵称',
					sort: true
				}, {
					field: 'email',
					width: '13%',
					title: '邮箱'
				}, {
					field: 'phone',
					width: '12%',
					title: '电话'
				}, {
					field: 'address',
					width: '10%',
					title: '地址',
					minWidth: 100
				}, {
					field: 'createTime',
					width: '13%',
					title: '创建时间',
					templet: '#createTime'
				}, {
					field: 'updateTime',
					width: '13%',
					title: '更新时间',
					templet: '#updateTime'
				}, {
					field: 'isLocked',
					width: '10%',
					title: '当前状态',
					templet: '#status'
				}, {
					fixed: 'right',
					width: '9%',
					align: 'center',
					title: '操作',
					toolbar: '#barDemo'
				}]
			],
			request: {
				pageName: 'page',
				limitName: 'size'
			},
			limit: 10,
			limits: [10, 20, 30, 40, 50]
		});

		//监听工具条
		table.on('tool(user_info_manager_filter)', function(obj) { //注：tool是工具条事件名，test是table原始容器的属性 lay-filter="对应的值"
			//获得当前行数据
			var data = obj.data;
			layEvent = obj.event; //获得 lay-event 对应的值
			if(layEvent === 'user_lock') {
				//锁定用户
				layer.confirm('您确定要锁定此用户吗？', {icon: 3, title:'锁定用户'}, function(index){  		
					$.get("http://localhost:9901/user/lockUser/2/" + data.username, function(result) {	
						if(result.status == 200) {
							layer.msg('已锁定', {
								icon: 1,
							  	time: 2000 
							}, 	function(){
							  window.location.reload()
							});
						} else {
							layer.msg(result.msg, {
								icon: 2,
							  	time: 2000 
							}, 	function(){
							  window.location.reload()
							});
						}

						
					})				
				});		
			} else if(layEvent === 'user_unlock') {
				//解锁用户
				layer.confirm('您确定要解锁此用户吗？', {icon: 3, title:'解锁用户'}, function(index){		
					$.get("http://localhost:9901/user/lockUser/1/" + data.username, function(result) {			
						if(result.status == 200) {
							layer.msg('已解锁', {
								icon: 1,
							  	time: 2000 
							}, 	function(){
							  window.location.reload()
							});
						} else {
							layer.msg(result.msg, {
								icon: 2,
							  	time: 2000 
							}, 	function(){
							  window.location.reload()
							});
						}						
					})										
				});	
			}
		});
		
	});
});


		

function timestampToTime(timestamp) {

	var date = new Date(timestamp);//时间戳为10位需*1000，时间戳为13位的话不需乘1000
    Y = date.getFullYear() + '-';
    M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '-';
    D = date.getDate() + ' ';
    h = date.getHours() + ':';
    m = date.getMinutes() + ':';
    s = date.getSeconds();
    return Y+M+D+h+m+s;
}

在js的table.render中，cols的field字段对应后台po的属性，template链接到html中的的script标签，用于格式化一些数据，或者按照自己的意愿显示。

三、po类

package com.jingling.basic.po;

import java.io.Serializable;
import java.sql.Timestamp;

/**
 * @Source: JDK 1.8
 * @Author: Zhao
 * @Since: version 1.0
 **/
public class User implements Serializable {

    private Integer id;
    private String username;
    private String nickname;
    private String password;
    private String openid;
    private String unionid;
    private String email;
    private String phone;
    private String address;
    private String salt;
    private String validateCode;
    private String isLocked;
    private Timestamp createTime;
    private Timestamp updateTime;

    public User() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getNickname() {
        return nickname;
    }

    public void setNickname(String nickname) {
        this.nickname = nickname;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getOpenid() {
        return openid;
    }

    public void setOpenid(String openid) {
        this.openid = openid;
    }

    public String getUnionid() {
        return unionid;
    }

    public void setUnionid(String unionid) {
        this.unionid = unionid;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getSalt() {
        return salt;
    }

    public void setSalt(String salt) {
        this.salt = salt;
    }

    public String getValidateCode() {
        return validateCode;
    }

    public void setValidateCode(String validateCode) {
        this.validateCode = validateCode;
    }

    public String getIsLocked() {
        return isLocked;
    }

    public void setIsLocked(String isLocked) {
        this.isLocked = isLocked;
    }

    public Timestamp getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Timestamp createTime) {
        this.createTime = createTime;
    }

    public Timestamp getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Timestamp updateTime) {
        this.updateTime = updateTime;
    }
}

四、controller代码

    @GetMapping("/getAllUserInfo")
    public Object getAllUserInfo(@RequestParam("page") Integer page, @RequestParam("size") Integer size) {

        int count = userService.getUserCount();
        List userList  = userService.getAllUserInfo(page, size);
        return new LayuiReplay(0, "OK", count, userList);

    }

layui要求，不仅传入数据，还得传入数据的总数，这样就可以使用其自带的分页效果。

五、小结

layui的交互其实并不难，很多人觉得layui的官方文档写的不好，因为好多东西拿过来不能直接使用，但其实他官网上好多示例都需要请求到数据才能执行。