jdbctemplate

SpringBoot：SpringBoot整合JdbcTemplate

由 浪尽此生 提交于 2019-12-11 16:02:17
个人其实偏向于使用类似于JdbcTemplate这种的框架，返回数据也习惯于接受Map/List形式，而不是转化成对象，一是前后台分离转成json方便，另外是返回数据格式，数据字段可以通过SQL控制，而不是返回整个对象字段数据，或者通过VO方式。当然更多人习惯于采用Bean形式，所以这里也同样使用Bean. 一、数据准备 CREATE TABLE `tb_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'ID', `username` varchar(50) NOT NULL COMMENT '用户名', `age` int(11) NOT NULL COMMENT '年龄', `ctm` datetime NOT NULL COMMENT '创建时间', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 INSERT INTO `db_test`.`tb_user` (`username`, `age`, `ctm`) VALUES('张三', '18', NOW()) ; INSERT INTO `db_test`.`tb_user` (`username`, `age`, `ctm`) VALUES('李四', '20', NOW()) ; INSERT

Spring JdbcTemplate update Postgis geography column

由 泄露秘密 提交于 2019-12-11 13:42:18
问题 I'm trying to update the Postgis geography column with Lon and Lat with the code below public void updateGeoLocation(String lat, String lon) { template.update( "UPDATE property set geo = ST_GeomFromText('POINT(? ?)', 4326) where id = 'b15e7a7e-3b27-4a2f-b312-33ebbed594b5'", lon, lat); } But I get the following exception org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [UPDATE property set geo = ST_GeomFromText('POINT(? ?)', 4326) where id = 'b15e7a7e

JdbcTemplate not working with autowiring [duplicate]

由 那年仲夏 提交于 2019-12-11 12:37:45
问题 This question already has answers here : Why is my Spring @Autowired field null? (16 answers) Closed 3 years ago . I am creating a REST application using Springboot. After doing some research I added JdbcTemplate to it rather than working directly with Jdbc and resultsets. I have the following configuration in application.properties . server.context-path=/foo spring.datasource.driverClassName=com.teradata.jdbc.TeraDriver spring.datasource.url=jdbc:teradata://url spring.datasource.username

Use Controller array in HTML Table with Spring Boot

由 旧城冷巷雨未停 提交于 2019-12-11 10:11:28
问题 My Controller function return array successfully. My Controller Code is : private JdbcTemplate jdbcTemplate; @Autowired ConfigurationController configcon = new ConfigurationController(jdbcTemplate); @RequestMapping(value = "/") public String index(Model model) { model.addAttribute("users", configcon.getQuery("customers")); return "forward:/index.html" ; } But How to use this array (For ex., users) in webapp/index.html? I want to display the database values in html table. Please Advice. Thank

ParameterizedRowMapper is recommended or RowMapper

由 有些话、适合烂在心里 提交于 2019-12-11 07:40:08
问题 I am very new to Spring JDBC and working on a given task, looking at the codes we already have my teammates have used RowMapper, but I was doing some Googling and saw some tutorials are using ParameterizedRowMapper , so I was wondering if there is any benefit or good practice in using one rather than the other one and your technical thoughts behind that... thanks. 回答1: Prior to Spring 3.0, most APIs did not use generics because Java 1.5 wasn't a requirement. As a result, there was a RowMapper

Retrieving Timestamp value from mysql database using Spring JDBC template

由 不打扰是莪最后的温柔 提交于 2019-12-11 07:19:06
问题 I am implementing a password recovery function in a Java project based on Spring. This is my methodology for that User clicks forgot password link In the next screen, user enter his email address which has been used to register his/her account System generates a UUID token and it is saved in a database table together with the email address user entered. In addition the expiry time is saved in database as a Timestamp value An email including a link to reset password is sent to user. (UUID

使用JdbcTemplate操作数据库

由 若如初见. 提交于 2019-12-11 07:07:32
环境：MYSQL8、JDK1.8、Spring Boot2.2 一、配置数据源 1）添加依赖 < ! -- MYSQL驱动 -- > < dependency > < groupId > mysql < / groupId > < artifactId > mysql - connector - java < / artifactId > < / dependency > < ! -- JDBC数据源 -- > < dependency > < groupId > org . springframework . boot < / groupId > < artifactId > spring - boot - starter - jdbc < / artifactId > < / dependency > 2）application.properties配置文件中配置数据库 #服务器端口 server . port = 8090 spring . datasource . url = jdbc : mysql : / / localhost : 3306 / spring_boot_part4 spring . datasource . username = root spring . datasource . password = root #MYSQL驱动 spring .

jdbcTemplate.update freezes

由 蓝咒 提交于 2019-12-11 06:33:58
问题 I'm using a Spring JdbcTemplate without a "transactionManager" since I have mostly select to do. When I try to call select queries from JUnit, it works, but when I try to call an "update", it freezes the test (no connection timeout, nothing, just waiting). I've seen examples of jdbcTemplates insert/update without any transactionManager, but could it be the problem here ? public void insert(String param1, String param2) { String sql = "UPDATE MYTABLE SET name = :param1 where first_name =

JDBC prepared statement creates one extra database hit without any params

由 ♀尐吖头ヾ 提交于 2019-12-11 04:58:46
问题 I have one annoying issue and i can not figure out why it is happening. To give you short introduction, i implemented batch processing (batch insert) using MySql and JDBC template on my Spring Boot project. So basically batch insert is working like it should, and performance is really amazing, BUT there is this one small issue that really is annoying and it causes constraint exception when i am inserting in one table that has unique key on two columns (id, value). So i have this code: private

Creating multiple object with one response using Spring FrameWork

由 会有一股神秘感。 提交于 2019-12-11 04:51:51
问题 This is my first time using Spring to add and get data from a database . I have successfully established connection with my database and can add Plants with only id and plantName but now for the part that I do not understand. How can I create an RowMapper or something else that would work with a loop that would get the Plant and go over all PlantParts to get me the object I need. I should note that Plant is just an Object I created to ask here to keep it cleaner and easier to answer. @Data
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