https://github.com/kingschan1204/jfastquery
一个用java实现的快速查询组件:whale: ,支持mysql,oracle,sqlserver
https://github.com/kingschan1204/jfastquery
freemarker java jsqlparser sql
Last synced: 10 months ago
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一个用java实现的快速查询组件:whale: ,支持mysql,oracle,sqlserver
- Host: GitHub
- URL: https://github.com/kingschan1204/jfastquery
- Owner: kingschan1204
- Created: 2017-02-17T02:59:09.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2019-05-16T10:26:06.000Z (almost 7 years ago)
- Last Synced: 2025-04-02T01:41:29.815Z (11 months ago)
- Topics: freemarker, java, jsqlparser, sql
- Language: Java
- Homepage: https://kingschan1204.github.io/jfastquery/
- Size: 91.8 KB
- Stars: 7
- Watchers: 2
- Forks: 7
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# jfastQuery
> 一个用java实现的快速查询组件,支持三种数据库
- mysql
- oralce
- sqlserver
### 背景
> 解决在java jdbc 开发中拼接sql语句的情景，通常sql会和java代码混在一起可读性差，像古代妇女的裹脚布一样，又长又臭。
### 特性
- 分页
- 排序
- 动态传参
- 动态组合where条件
- 支持freemarker表达式（在sql里写ftl指令）
- `让Java和sql语句分离`
### 查询条件关键字
|关键字|说明|
|-|-|
logic|and or 运算符
operator|对应下方表格 where 操作符
table|sql表别名
field| 字段名称或者括号( )
value|值
value2|日期字段下的第2个值
type|字段类型：TEXT,NUMBER,DATE,STRING,SELECT,DATETIME,BOOLEAN
### where 操作符
|类型|jfastQuery|英文|
|-|-|-|
等于|eq|equals
不等于|neq| not equals
大于|gt| greater than
小于|lt|less than
大于等于|gte|Greater than or equal to
小于等于|lte|Less than equal
介于|bw|between
包含|c|Contain
左包含|sw| start with
右包含|ew|end with
集合|...| in
空|nl|is null
非空|nnl|is not null
### 配置文件`fastquery.properties`
```
#jfastquery默认数据源实现类
app.default.datasource=com.kingschan.fastquery.test.DruidDatasourceConfigure
#对应pageindex关键字
app.keyword.page.index=offset
#对应pagesize关键字
app.keyword.page.size=limit
#对应where 条件组合json字符串关键字
app.keyword.filter=filter
# 对应排序字段
app.keyword.sort=sort
# 对应排序方式关键字
app.keyword.order=order
```
### 默认数据源实现
实现类：`com.kingschan.fastquery.conf.Configure`
```
public class DruidDatasourceConfigure implements Configure{
@Override
public DataSource getDataSource() throws Exception {
Map properties = new HashMap();
properties.put("url", "jdbc:mysql://ip:端口/数据库名");
properties.put("username", "用户名");
properties.put("password", "密码");
properties.put("filters", "stat");
properties.put("maxActive", "20");
properties.put("initialSize", "1");
properties.put("maxWait", "60000");
properties.put("minIdle", "1");
properties.put("timeBetweenEvictionRunsMillis", "60000");
properties.put("minEvictableIdleTimeMillis", "300000");
properties.put("testWhileIdle", "true");
properties.put("testOnBorrow", "false");
properties.put("testOnReturn", "false");
properties.put("poolPreparedStatements", "true");
properties.put("maxOpenPreparedStatements", "20");
return DruidDataSourceFactory.createDataSource(properties);
}
}
```
## java运行demo参考
```
public class QueryDispacherTest {
private static Logger log = LoggerFactory.getLogger(QueryDispacherTest.class);
public static void main(String[] args) {
List conditions=new ArrayList();
conditions.add(new SqlCondition("and","a.req_datetime","DATE","bw","2017-01-01","2017-02-01"));
String filter=JSONArray.fromObject(conditions).toString();
//查询方案所有传入参数
Map map = new HashMap();
map.put("filter",filter);//查询条件
map.put("sort","req_datetime");//排序字段
map.put("order","desc");//排序的方式
map.put("limit","10");//显示条数
map.put("offset","1");//第几页
map.put("blog","kingschan");//传入变量blog
SqlCommand cmd = new SqlCommand();
cmd.setSql("select req_ip,count(1) total from blog_request_log a where a.req_blog='${blog}' group by req_ip");
cmd.setDBtype(DbType.MYSQL);
DataTransfer dt= new LogicHandleDispacher().handleDispacher(map,cmd,new Class[]{
BuildConditionLogicHandle.class,
BuildVariableLogicHandle.class,
BuildPagingLogicHandle.class,
ExecuteTotalLogicHandle.class,
ExecuteMapQueryLogicHandle.class
});
log.info("{}", JSONObject.fromObject(dt));
}
}
```
## servlet 运行demo参考类
```
public class ServletTest extends HttpServlet{
private static final long serialVersionUID = 1L;
//http://localhost/jfastquery/test?offset=1&limit=30&sort=req_datetime&order=desc
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
IOException {
//查询方案所有传入参数
Map map =ServletUtil.getParameterMap(req);
List conditions= new ArrayList();
conditions.add( new SqlCondition("and","a.req_datetime","DATE","bw","2017-01-01","2017-02-01"));
conditions.add( new SqlCondition("and","a.req_blog","STRING","eq","kingschan",null));
JSONArray jons=JSONArray.fromObject(conditions);
map.put("filter",jons);//查询条件
map.put("sort","id");//排序字段
map.put("order","desc");//排序的方式
map.put("limit","10");//显示条数
map.put("offset","1");//第几页
WebLogicHandleDispacher dispa = new WebLogicHandleDispacher(req, resp);
SqlCommand cmd = new SqlCommand();
cmd.setSql("select * from blog_request_log a limit 10");
cmd.setDBtype(DbType.MYSQL);
dispa.handleDispacher(map,cmd, new StandardOutPut(),
new Class[]{
BuildConditionLogicHandle.class,
BuildVariableLogicHandle.class,
BuildPagingLogicHandle.class,
ExecuteTotalLogicHandle.class,
ExecuteMapQueryLogicHandle.class
});
}
}
```