【第一篇】搞定BootstrapTable(后端使用SpringMVC+Hibernate)
还是那句老话,好记性不如烂笔头。记得以前的一个Demo项目里面有分页,但是没有用插件,自己手写的分页处理,但是效果并不是很好,最近接触到插件BootstrapTable,风格和Bootstrap统一,现在就来说说怎样使用它。
初上手,直接套json数据进去,然后设置分页方式为client',很快表格就做出来,但是一般项目中都是使用后台来进行分页的,不可能一下从数据库从捞出成千上万条数据,先不说流量的问题,客户端的渲染也吃力。在使用服务器后端分页的过程中,也遇到了一些问题,相信大部分初次接触BootstrapTable的人应该都会遇到。所以特此写一个完整的例子,后面应该还会继续完善,包括增、删、改。
好,废话少说,上代码。
先上项目架构:
项目使用maven构建,由于项目结构不是很复杂,所以就不做过多介绍。
接下来看index.jsp
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<link rel="stylesheet" href="css/bootstrap.css" type="text/css" />
<link rel="stylesheet" href="css/bootstrap-table.css" type="text/css">
<script type="text/javascript" src="js/jquery-2.0.0.min.js"></script>
<script type="text/javascript" src="js/bootstrap.js"></script>
<script type="text/javascript" src="js/bootstrap-table.js"></script>
<script type="text/javascript" src="js/bootstrap-table-zh-CN.js"></script>
<body>
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title text-center">Bootstrap-table样例演示</h3>
</div>
<div class="panel-body">
<div id="toolbar" class="btn-group">
<button id="btn_edit" type="button" class="btn btn-default">
<span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>修改
</button>
<button id="btn_delete" type="button" class="btn btn-default">
<span class="glyphicon glyphicon-remove" aria-hidden="true"></span>删除
</button>
</div>
<table data-toggle="table" id="table" data-height="400"
data-classes="table table-hover" data-striped="true"
data-pagination="true" data-side-pagination="server"
data-search="true" data-show-refresh="true" data-show-toggle="true"
data-show-columns="true" data-toolbar="#toolbar">
<thead>
<tr>
<th data-field="state" data-checkbox='ture'></th>
<th></th>
<th></th>
<th></th>
<th></th>
</tr>
</thead>
</table>
</div>
</div>
</body>
<script type="text/javascript">
$("#superBtn").click(function() {
$.get("getPageInfo?limit=5&offset=0", function(data, status) {
alert(status);
alert(data.userList[0].name);
});
});
$(document).ready(function(){
$("button[name='toggle']").height(20);
$("button[name='refresh']").height(20);
});
function edit(id) {
alert(id);
}
$("#table")
.bootstrapTable(
{
url : "getPageInfo", //数据请求路径
clickToSelect : true, //点击表格项即可选择
dataType : "json", //后端数据传递类型
pageSize : 5,
pageList : [ 5, 10, 20 ],
// contentType : "application/x-www-form-urlencoded",
method : 'get', //请求类型
dataField : "data", //很重要,这是后端返回的实体数据!
//是否显示详细视图和列表视图的切换按钮
queryParams : function(params) {//自定义参数,这里的参数是传给后台的,我这是是分页用的
return {//这里的params是table提供的
offset : params.offset,//从数据库第几条记录开始
limit : params.limit
//找多少条
};
},
responseHandler : function(res) {
//在ajax获取到数据,渲染表格之前,修改数据源
return res;
},
columns : [
{
field : 'state',
},
{
field : 'id',
title : 'ID',
align : 'center'
},
{
field : 'name',
title : '姓名',
align : 'center'
},
{
field : 'age',
title : '年龄',
align : 'center'
},
{
field : 'address',
title : '地址',
align : 'center'
},
{
title : '操作',
field : 'id',
align : 'center',
formatter : function(value, row, index) {
var e = '<a href="#" mce_href="#" onclick="edit(\''
+ row.id + '\')">编辑</a> ';
var d = '<a href="#" mce_href="#" onclick="del(\''
+ row.id + '\')">删除</a> ';
return e + d;
}
} ]
});
</script>
</html>
重要的几点:1、导入必要的css文件和js文件,并注意版本问题,这个后面会谈 2、queryParams:这是在点击分页或者初次加载表格的时候,前端向后端传递的数据,有2个,分别是limit和offset,limit表示请求的记录条数,offset表示记录的偏移量 3、dataField:表示后端传递的对象数据,名字要与对象的名字相同。
再来看Controller:
package controller;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import dao.UserDao;
@Controller
public class BootstrapTableController {
@RequestMapping("/getPageInfo")
public @ResponseBody Map<String,Object> getPageInfo(int limit,int offset) {
System.out.println("limit is:"+limit);
System.out.println("offset is:"+offset);
UserDao userDao = new UserDao();
Map<String,Object> map = userDao.queryPageInfo(limit, offset);
return map;
}
}
Controller接收前端传过来的limit和offset参数,然后根据这2个参数调用dao层方法来获取数据。再看UserDao:
package dao;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.query.Query;
import entity.User;
public class UserDao {
private Session session;
private Transaction transaction;
public Session getSession() {
Configuration config = new Configuration().configure();
SessionFactory sessionFactory = config.buildSessionFactory();
Session session = sessionFactory.openSession();
return session;
}
public Map<String, Object> queryPageInfo(int limit, int offset) {
String sql = "from User";
Session session = this.getSession();
Query query = session.createQuery(sql);
query.setFirstResult(offset);
query.setMaxResults(limit);
List<User> userList = query.list();
String sql2 = "select count(*) from User";
int totalRecord = Integer.parseInt(session.createQuery(sql2).uniqueResult().toString());
Map<String, Object> map = new HashMap<String, Object>();
map.put("total", totalRecord);
map.put("data", userList);
return map;
}
}
userDao也是比较简单的,关键就是total和data了,这是要返回到前台的数据,注意名字要和前台相对应,你只要返回实体数据和记录总数就可以了,剩下的BootstrapTable替你搞定。
接下来在看看entity层的User
package entity;
public class User {
private int id;
private String name;
private int age;
private String address;
public User() {
super();
}
public User(int id,String name, int age, String address) {
super();
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
public String getName() {
return name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", age=" + age + ", address=" + address + "]";
}
}
还有几个配置文件,分别是SpirngMVC的配置文件,还有web.xml以及pom.xml,该配的得配上:
SpringMVC-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!-- <mvc:annotation-driven/> -->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter" />
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
</mvc:message-converters>
</mvc:annotation-driven>
<context:component-scan base-package="controller"/>
<!-- 这两个类用来启动基于Spring MVC的注解功能,将控制器与方法映射加入到容器中 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<!-- 这个类用于Spring MVC视图解析 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
web.xml:
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.ttf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.woff</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.woff2</url-pattern>
</servlet-mapping>
</web-app>
pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Demo</groupId>
<artifactId>BootstrapDemo</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>BootstrapDemo Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.6.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.41</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.9</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.9</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.8.9</version>
</dependency>
</dependencies>
<build>
<finalName>BootstrapDemo</finalName>
</build>
</project>
然后dao层的就算了,很简单。到这里基本上所有的关键都已经展示了,来看看效果吧:
不知道细心的你注意到没有,右上角的一个按钮明显大了一圈,这不太好,其实是它左边2个按钮小了一圈,在网上找了很久,基本上没有人遇到这样的问题,没办法,逼我出绝招,使用调试器跟踪这两个按钮元素,最后使用jQuery在表格加载完毕然后手动改变其大小,然后正常了。
当然,这只涉及到了查数据,还有数据的删除、新增和修改,后面再来介绍这些的实现,其实最关键的还是查,查做出来了,其他的就水到渠成了。