jdbctemplate

springboot使用jdbcTemplate案例

折月煮酒 提交于 2019-12-14 11:10:37
1 创建实体类 public class Student { private Integer stuid; private String stuname; public Integer getStuid() { return stuid; } public void setStuid(Integer stuid) { this.stuid = stuid; } public String getStuname() { return stuname; } public void setStuname(String stuname) { this.stuname = stuname; } public Student(Integer stuid, String stuname) { this.stuid = stuid; this.stuname = stuname; } public Student(){} public Student(String stuname) { this.stuname = stuname; } } 2 创建Dao层(Dao层接口和实现类合并) @Repository public class StudentDao { @Resource private JdbcTemplate jdbcTemplate; //查询所有学生信息 public List

SpringBoot使用JdbcTemplate

▼魔方 西西 提交于 2019-12-14 11:01:34
   Spring对数据库的操作在jdbc上面做了深层次的封装,使用spring的注入功能,可以把DataSource注册到JdbcTemplate之中。 JdbcTemplate 是在JDBC API基础上提供了更抽象的封装,并提供了基于方法注解的事务管理能力。 通过使用SpringBoot自动配置功能并代替我们自动配置beans. 导入依赖 <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency>

Spring框架(AOP、JDBCTemplate、事务控制)

纵饮孤独 提交于 2019-12-14 05:52:26
银行转账案例分析 在更新转入账户和转出账户时,中间加上这句: 造成:虽然报错,但是数据库更新了部分数据 再来看看QueryRunner的配置: <!--配置QueryRunner--> <bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"> <!--注入数据源--> <constructor-arg name="ds" ref="dataSource"></constructor-arg> </bean> 可以看到,每一次与数据库进行交互,都会产生一个Runner. 一个函数里面所有的操作,都应该由一个Connection来操作: 解决方法:让业务层实现业务的回滚 定义Utils.ConnectionUtils.java,连接的工具类,用于从数据源中获取一个链接,并且实现和线程的绑定: public Connection getThreadConnection(){ //1、先从ThreadLocal上获取 Connection conn = tl.get(); //2、判断当前线程上是否有链接 if(conn == null){ //从数据源中获取一个链接,和线程绑定,存入ThreadLocal中 conn = datasource.getConnection();

Delete query generating UncategorizedSQLException and ORACLE memory issue in SPRING framework

我只是一个虾纸丫 提交于 2019-12-13 15:27:16
问题 I am trying to process a delete query in eclipse using the SPRING jdbcTemplate and ORACLE as DBMS. The code is the following : jdbcTemplate.update("DELETE FROM PRMSVC_EF WHERE EF_SSC_ID in (SELECT es.EF_SSC_ID FROM EF_SSC es WHERE es.NUMCPTPFS = '1086878547'") as error I get org.springframework.jdbc.UncategorizedSQLException : StatementCallback; uncategorized SQLException for [DELETE FROM PRMSVC_EF WHERE EF_SSC_ID in (SELECT es.EF_SSC_ID FROM EF_SSC es WHERE es.NUMCPTPFS = '1086878547'] and

Optimizing JDBC fetch size by use of Spring Boots application.properties

旧巷老猫 提交于 2019-12-13 12:33:48
问题 My Spring Boot 1.3.1 based application relies on an Oracle 11.2 database and I want to tune the fetching of SELECT statement results. JdbcTemplate offers public void setFetchSize(int fetchSize) to tune the fetch size, which for Oracle is preset to 10 by the driver: Set the fetch size for this JdbcTemplate. This is important for processing large result sets: Setting this higher than the default value will increase processing speed at the cost of memory consumption; setting this lower can avoid

Spring NamedParameterJdbcTemplate not returning result for simple query

£可爱£侵袭症+ 提交于 2019-12-13 07:57:43
问题 Please bare with my limited info on code since having limited access to copy paste complete code. @Repository("BaseDao") public class BaseDaoImpl implements BaseDao{ public NamedParameterJdbcTemplate namedJdbcTemplate; @Autowired public void setDataSource(DataSource dataSource){ this.namedJdbcTemplate = new NamedParameterJdbcTemplate(dataSource); } } @Repository("WelcomeDao") public class WelcomeDaoImpl extends BaseDaoImpl implements WelcomeDao { public List<String> getFunctionTypes() {

postgresql Not In clause using batch update

梦想的初衷 提交于 2019-12-13 05:42:34
问题 what i need is a query to delete all ids except those i have specified. therefore i have such a query in spring: private final String SQL_Clear_Deleted_Options = "DELETE FROM vote_votes WHERE poll_id=? AND option_id <> ?"; i'm using jdbcTemplate and batchUpdate to do so. i also used <> operator to indicate NOT IN clause. this is my code: public void clearDeletedOptions(int id) { int[] argTypes = { Types.INTEGER, Types.INTEGER }; List<Object[]> batchArgs = new ArrayList<>(); for (int i:ids) {

Is there a generic way of getting columns in ResultsSet of MapRow

风流意气都作罢 提交于 2019-12-13 02:48:07
问题 I am using SimpleJdbcTemplate and for example I have something like this: @Override public Variant mapRow(ResultSet rs, int rowNum) throws SQLException then I am getting the values from this result set with lines of code like this: variant.setName(rs.getString("variant_name")); so I have to look at my table, see what type should I use for each column, - getString for String in this example - ...so I will have getString, getLong, getInt,... I was wondering if there a more generic way of

Stored Function - Sending/Receiving Boolean - BD

断了今生、忘了曾经 提交于 2019-12-13 02:17:45
问题 Found the solution, see bellow* I'm trying to execute a stored function, via SimpleJdbcCall (using java + jpa) but I can't execute, it shows: [Request processing failed; nested exception is org.springframework.jdbc.UncategorizedSQLException: CallableStatementCallback; uncategorized SQLException for SQL [{? = call PK_BACKOFFICE.SET_PROFESSIONAL(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)}]; SQL state [null]; error code [17004]; Invalid column type; nested exception is java.sql.SQLException: Invalid column

jooq issue with limit and offset

眉间皱痕 提交于 2019-12-12 13:39:11
问题 I have integrated jooq with spring and for all types of querying to the database (MySQL), I am using JDBC Template of spring. jooq library is used here to generate the sql query to pass to jdbc template. Though my rest of the query works fine until I add limit and/or offset to the query. I am generating query as follows: create.select(Factory.field("table_name")) .from("tables t") .where("t.table_schema LIKE '" + schemaName + "'") .limit(10) .offset(2) .getSQL(); I am getting error as follows