flea-db使用之SQL模板接入

Posted 2023-02-16

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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：

mysql数据库 (客户端可以使用 navicat for mysql)
新建测试数据库 fleajpatest
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 id="insert" 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 id="insert" 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： 新增数据： 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： 新增数据：

2.3 查询数据

相关配置可查看：

	<param id="select" 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 id="select" 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： 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：

2.4 更新数据

相关配置可查看：

	<param id="update" 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 id="update" 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： 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：

2.5 删除数据

相关配置可查看：

	<param id="delete" 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 id="delete" 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： 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：

2.6 分页查询

当前数据库数据如下： 相关配置可查看：

	<param id="select_1" 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 id="select_1" 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： 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：

2.7 单个结果查询--计数

相关配置可查看：

	<param id="select_2" 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 id="select_2" 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： 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：

2.8 单个结果查询--总和

相关配置可查看：

	<param id="select_3" 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 id="select_3" 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： 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：

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

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