下面是详细讲解“layui的数据表格+springmvc实现搜索功能的例子”的完整攻略:
一、前置条件
- 确定使用的IDE是IntelliJ IDEA;
- 确保已经创建了一个Spring MVC的web工程;
- 确保已经配置好了Layui相关的静态资源。
二、添加依赖
添加spring-data-jpa、MySQL JDBC驱动、Spring Web MVC等依赖。
<!-- Spring Web MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Spring Data JPA -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>${spring-data.version}</version>
</dependency>
<!-- MySQL JDBC Driver -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector.version}</version>
</dependency>
三、创建数据表格
使用Layui实现一个数据表格,并添加搜索功能。
<table id="userTable" lay-filter="userTable"></table>
<script>
layui.use('table', function(){
var table = layui.table;
table.render({
elem: '#userTable',
url: '/user/query',
cols: [[
{field:'id', title: 'ID', width:100},
{field:'username', title: '用户名', width:100},
{field:'email', title: '邮箱', width:200},
{field:'phone', title: '手机', width:120},
{field:'createTime', title: '创建时间', width:200}
]],
page: true,
limits: [10, 20, 30],
limit: 10,
ajaxParams: {
// ajax参数,可用于搜索等操作
},
parseData: function(res){ // res为服务端返回的数据
return {
"code": res.code, // 解析接口状态
"msg": res.msg, // 解析提示文本
"count": res.data.total, // 解析数据长度
"data": res.data.records // 解析数据列表
};
}
});
// 搜索按钮点击事件
$('#searchBtn').click(function(){
var key = $('#searchInput').val();
table.reload('userTable',{
where:{
'key': key
}
});
});
});
</script>
四、添加Controller
创建UserController,添加查询用户数据的方法。
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/query")
@ResponseBody
public Result query(UserSearchCondition condition) {
Page<User> page = userService.findByCondition(condition);
return Result.success(page);
}
}
// UserSearchCondition.java
@Data
public class UserSearchCondition {
private Integer page = 1;
private Integer limit = 10;
private String key;
public Pageable getPageable() {
return PageRequest.of(page - 1, limit);
}
}
// UserService.java
public interface UserService {
Page<User> findByCondition(UserSearchCondition condition);
}
// UserServiceImpl.java
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository repository;
@Override
public Page<User> findByCondition(UserSearchCondition condition) {
UserSpecification specification = new UserSpecification(condition);
return repository.findAll(specification, condition.getPageable());
}
}
// UserSpecification.java
public class UserSpecification implements Specification<User> {
private UserSearchCondition condition;
public UserSpecification(UserSearchCondition condition) {
this.condition = condition;
}
@Override
public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
List<Predicate> predicates = new ArrayList<>();
if (StringUtils.isNotEmpty(condition.getKey())) {
String pattern = "%" + condition.getKey() + "%";
Predicate usernameLike = cb.like(root.get("username"), pattern);
Predicate emailLike = cb.like(root.get("email"), pattern);
Predicate phoneLike = cb.like(root.get("phone"), pattern);
predicates.add(cb.or(usernameLike, emailLike, phoneLike));
}
return cb.and(predicates.toArray(new Predicate[0]));
}
}
五、编写SQL脚本
创建user表,并向表中添加一些测试数据。例如:
CREATE TABLE user
(
id
int(11) NOT NULL AUTO_INCREMENT,
username
varchar(32) NOT NULL COMMENT '用户名',
email
varchar(64) NOT NULL COMMENT '邮箱',
phone
varchar(16) NOT NULL COMMENT '手机',
password
varchar(64) NOT NULL COMMENT '密码',
create_time
datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
update_time
datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户信息表';
INSERT INTO user
(id
, username
, email
, phone
, password
, create_time
, update_time
)
VALUES
(1, 'admin', 'admin@qq.com', '13800138000', '123456', '2021-09-15 16:14:12', '2021-09-15 16:14:12'),
(2, 'tom', 'tom@qq.com', '13900139000', '123456', '2021-09-15 16:14:36', '2021-09-15 16:14:36'),
(3, 'jack', 'jack@qq.com', '13600136000', '123456', '2021-09-15 16:14:49', '2021-09-15 16:14:49');
六、测试
启动Web应用程序,并在浏览器中访问http://localhost:8080/user/query
,将会返回所有用户的数据列表。此时,我们可以在搜索框中输入关键字,点击搜索按钮,即可过滤数据,显示符合搜索条件的数据。
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