flea-db使用之SQL模板接入

时间:2023-02-15 17:05:27

SQL模板接入

本篇将要演示SQL模板的使用,目前包含INSERT模板、SELECT模板、UPDATE模板、DELETE模板。

1. 准备工作

为了演示SQL模板接入(参考 JPA接入 中的准备工作),需要如下准备:

  1. MySQL数据库 (客户端可以使用 navicat for mysql)
  2. 新建测试数据库 fleajpatest
  3. 新建测试表 student

2. 使用讲解

2.1 SQL模板配置

SQL模板配置包含了SQL模板规则,SQL模板定义,SQL模板参数,SQL关系配置。具体配置可至GitHub,查看 flea-sql-template.xml

2.2 新增数据

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- 这两个不填,表示表的字段全部使用-->
        <property key="columns" value="stu_name, stu_age, stu_sex, stu_state" />
        <property key="values" value=":stuName:, :stuAge:, :stuSex:, :stuState:" />
	</param>

	<relation  templateId="insert" paramId="insert" name="SQL关系"/>

JPA方式接入SQL模板:

	@Test
    public void testInsertSqlTemplateFromJPA() throws Exception{
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("王老五");
        student.setStuAge(35);
        student.setStuSex(1);
        student.setStuState(1);

        int ret = studentSV.insert("insert", student);
        LOGGER.debug("result = {}", ret);
    }

运行结果: flea-db使用之SQL模板接入新增数据: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

    @Test
    public void testInsertSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("钱老六");
        student.setStuAge(30);
        student.setStuSex(1);
        student.setStuState(1);

        int ret = FleaJDBCHelper.insert("insert", student);
        LOGGER.debug("result = {}", ret);
    }

运行结果: flea-db使用之SQL模板接入新增数据: flea-db使用之SQL模板接入

2.3 查询数据

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数; 如需查询全部,则设置key=columns的属性值为 *,即可">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- SELECT 显示列 -->
		<property key="columns" value="*" />
		<!-- WHERE 子句 , 出现 xml不能直接识别的需要转义,如 >, < 等-->
		<property key="conditions" value="stu_name LIKE :stuName: AND stu_sex = :stuSex: AND stu_age &gt;= :minAge: AND stu_age &lt;= :maxAge:" />
	</param>

	<relation  templateId="select" paramId="select" name="SQL关系"/>

JPA方式接入SQL模板:

    @Test
    public void testQuerySqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("%老%");
        student.setStuSex(1);
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Student List = {}", studentSV.query("select", student));
    }

运行结果: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

	@Test
    public void testQuerySqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("%老%");
        student.setStuSex(1);
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Student List = {}", FleaJDBCHelper.query("select", student));
    }

运行结果: flea-db使用之SQL模板接入

2.4 更新数据

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- SET 子句 -->
		<property key="sets" value="stu_name = :stuName, stu_age = :stuAge" />
		<!-- WHERE 子句 , 出现 xml不能直接识别的需要转义,如 >, < 等-->
		<property key="conditions" value="stu_name LIKE :sName: AND stu_state = :stuState: AND stu_sex = :stuSex: AND stu_age &gt;= :minAge: AND stu_age &lt;= :maxAge:" />
	</param>
		
	<relation  templateId="update" paramId="update" name="SQL关系"/>

JPA方式接入SQL模板:

    @Test
    public void testUpdateSqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("王老五1");
        student.setStuAge(40);
        student.setStuState(1);
        student.setStuSex(1);
        student.put("sName", "%王老五%");
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Result = {}", studentSV.update("update", student));
    }

运行结果: flea-db使用之SQL模板接入flea-db使用之SQL模板接入JDBC方式接入SQL模板:

    @Test
    public void testUpdateSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("钱老六1");
        student.setStuAge(35);
        student.setStuState(1);
        student.setStuSex(1);
        student.put("sName", "%钱老六%");
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Result = {}", FleaJDBCHelper.update("update", student));
    }

运行结果: flea-db使用之SQL模板接入flea-db使用之SQL模板接入

2.5 删除数据

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- WHERE 子句 -->
		<property key="conditions" value="stu_name LIKE :stuName: AND stu_state = :stuState: AND stu_sex = :stuSex: AND stu_age &gt;= :minAge: AND stu_age &lt;= :maxAge:" />
	</param>
		
	<relation  templateId="delete" paramId="delete" name="SQL关系"/>

JPA方式接入SQL模板:

    @Test
    public void testDeleteSqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("%王老五%");
        student.setStuState(1);
        student.setStuSex(1);
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Result = {}", studentSV.delete("delete", student));
    }

运行结果: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

    @Test
    public void testDeleteSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("%钱老六%");
        student.setStuState(1);
        student.setStuSex(1);
        student.put("minAge", 20);
        student.put("maxAge", 40);

        LOGGER.debug("Result = {}", FleaJDBCHelper.delete("delete", student));
    }

运行结果: flea-db使用之SQL模板接入

2.6 分页查询

当前数据库数据如下: flea-db使用之SQL模板接入相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数; 如需查询全部,则设置key=columns的属性值为 *,即可">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- SELECT 显示列 -->
		<property key="columns" value="*" />
		<!-- WHERE 子句 , 出现 xml不能直接识别的需要转义,如 >, < 等-->
		<property key="conditions" value="stu_name LIKE :stuName: AND stu_sex = :stuSex: AND stu_age &gt;= :minAge: AND stu_age &lt;= :maxAge: ORDER BY stu_id DESC LIMIT :pageStart:, :pageCount:" />
	</param>
	
	<relation  templateId="select" paramId="select_1" name="SQL关系"/>

JPA方式接入SQL模板:

	@Test
    public void testQueryPageSqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("%张三%");
        student.setStuSex(1);
        student.put("minAge", 18);
        student.put("maxAge", 20);
        int pageNum = 1;   // 第一页
        int pageCount = 5; // 每页5条记录
        student.put("pageStart", (pageNum - 1) * pageCount);
        student.put("pageCount", pageCount);

        List<Student> studentList = studentSV.query("select_1", student);
        LOGGER.debug("Student List = {}", studentList);
        LOGGER.debug("Student Count = {}", studentList.size());
    }

运行结果: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

 	@Test
    public void testQueryPageSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("%李四%");
        student.setStuSex(1);
        student.put("minAge", 18);
        student.put("maxAge", 20);
        int pageNum = 1;   // 第一页
        int pageCount = 5; // 每页5条记录
        student.put("pageStart", (pageNum - 1) * pageCount);
        student.put("pageCount", pageCount);

        List<Map<String, Object>> studentList = FleaJDBCHelper.query("select_1", student);
        LOGGER.debug("Student List = {}", studentList);
        LOGGER.debug("Student Count = {}", studentList.size());
    }

运行结果: flea-db使用之SQL模板接入

2.7 单个结果查询--计数

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数; 如需查询全部,则设置key=columns的属性值为 *,即可">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- SELECT 显示列 -->
		<property key="columns" value="count(*)" />
		<!-- WHERE 子句 , 出现 xml不能直接识别的需要转义,如 >, < 等-->
		<property key="conditions" value="stu_name LIKE :stuName: AND stu_sex = :stuSex: AND stu_age &gt;= :minAge: AND stu_age &lt;= :maxAge:" />
	</param>
		
	<relation  templateId="select" paramId="select_2" name="SQL关系"/>

JPA方式接入SQL模板:

    @Test
    public void testQueryCountSqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");

        Student student = new Student();
        student.setStuName("%张三%");
        student.setStuSex(1);
        student.put("minAge", 18);
        student.put("maxAge", 20);

        LOGGER.debug("Student Count = {}", studentSV.querySingle("select_2", student));
    }

运行结果: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

    @Test
    public void testQueryCountSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");

        Student student = new Student();
        student.setStuName("%李四%");
        student.setStuSex(1);
        student.put("minAge", 18);
        student.put("maxAge", 20);

        LOGGER.debug("Student Count = {}", FleaJDBCHelper.querySingle("select_2", student));
    }

运行结果: flea-db使用之SQL模板接入

2.8 单个结果查询--总和

相关配置可查看 :

	<param  name="SQL模板參數" desc="用于定义SQL模板中的替换参数; 如需查询全部,则设置key=columns的属性值为 *,即可">
		<!-- 表名 -->
		<property key="table" value="student" />
		<!-- SELECT 显示列 -->
		<property key="columns" value="sum(stu_age)" />
		<!-- WHERE 子句 , 出现 xml不能直接识别的需要转义,如 >, < 等-->
		<property key="conditions" value="1=1" />
	</param>
		
	<relation  templateId="select" paramId="select_3" name="SQL关系"/>

JPA方式接入SQL模板:

	@Test
    public void testQuerySumSqlTemplateFromJPA() throws Exception {
        IStudentSV studentSV = (IStudentSV) applicationContext.getBean("studentSV");
        LOGGER.debug("Student Age = {}", studentSV.querySingle("select_3", new Student()));
    }

运行结果: flea-db使用之SQL模板接入JDBC方式接入SQL模板:

    @Test
    public void testQuerySumSqlTemplateFromJDBC() throws Exception {
        FleaJDBCConfig.init(DBSystemEnum.MySQL.getName(), "fleajpatest");
        LOGGER.debug("Student Age = {}", FleaJDBCHelper.querySingle("select_3", new Student()));
    }

运行结果: flea-db使用之SQL模板接入


上述单个结果查询,展示了count和sum,其他avg,max,min等相关内容可以移步 GitHub, 查看 StudentSqlTemplateTest