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JDBC对象式查询,可以非常容易地从数据库中获取Java对象或字符串式JSON对象,支持分页查询,性能媲美JDBC手动编码,单表查询是hibernate、JPA、Spring JDBC不能企及的,如果需要多表字段,建议使用视图查询,支持直接返回JSON字符串,方便页面使用。查询只需一行代码,使用非常简单,几乎没有学习成本。关于第三方依赖,除Spring JDBC,可选依赖ASM或Javassist。

License: Apache License 2.0

Java 99.96% JavaScript 0.04%

nway-jdbc's Introduction

Nway-JDBC基于Spring JDBC,扩展自Spring的JdbcTemplate,完全兼容Spring JDBC。

如遇问题可联系[email protected]或QQ:670950251。

如果您通过开源**访问,发现不登录不能下载,可以到 https://github.com/zdtjss/nway-jdbc 完成您的操作。

使用中SqlExecutor的日志级别需要单独配置,且要高于debug,不然会影响性能,因为JdbcTemplate.handleWarnings()比较耗时。

查询不到数据时:

  • queryForBean返回null;
  • queryForBeanList返回值size() == 0;
  • queryForBeanPagination返回值getTotalCount() == 0;
  • queryForMapListPagination返回值getTotalCount() == 0;
  • queryForJson返回"{}"
  • queryForJsonList返回"[]"
  • queryForJsonPagination返回{"totalCount":0,"pageCount":0,"page":XX,"pageSize":XX}

第三方依赖: ASM或Javassist

数据库表字段与Java类属性映射规则:

去除表字段中下划线(_)与Java类属性名称忽略大小写比较,相等则赋值,如:表字段名称为user_name,会通过类中setUserName方法赋值。
也可以通过com.nway.spring.jdbc.annotation.Column修改默认规则。如:

  @Column("user_name")
  public String getName()

Java对象查询支持(JSON字符串单对象及对象集查询与Java对象查询有类似方法)

单对象:

    各种参数的queryForBean方法支持单个Java对象查询
	
    User usr = sqlExecutor.queryForBean("select * from t_user where id = ?", User.class, 10000);
	
对象集:

    各种参数的queryForBeanList方法支持多个Java对象查询
	
    List<User> users = sqlExecutor.queryForBeanList("select * from t_user where id <> ?", User.class, 10000);
	
分页对象集:

    各种参数的queryForBeanPagination方法支持Java对象分页查询
	
    Pagination<User> users = sqlExecutor.queryForBeanPagination("select * from t_user where id <> ? order by id", new Object[]{ 10000 }, 1, 10, User.class);
	
    //页面数据 List<T>
    users.getPageData();
	
    //页面数据条数
    users.getPageSize();
	
    //总数据条数
    users.getTotalCount()
	
    //页面大小
    users.getPageSize();
	
    //页数
    users.getPageCount();
	
    //当前页码
    users.getCurrentPage();
	
Map对象集分页:

    各种参数的queryForMapListPagination方法支持Map对象分页查询
	
    Pagination<Map<String, Object>> users = sqlExecutor.queryForMapListPagination("select * from t_user where id <> ? order by id", new Object[]{ 10000 }, 1, 10);
	
    users使用同queryForBeanPagination

分页默认支持Oracle、Mysql、MariaDB,关于其他数据库的分页可以实现com.nway.spring.jdbc.PaginationSupport接口,通过com.nway.spring.jdbc.SqlExecutor.setPaginationSupport方法引入。

nway-jdbc's People

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