SpringBoot使用JdbcTemplate 项目启动报错：

Question

报错详情：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-03-13 15:31:51.932 ERROR 31060 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :

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APPLICATION FAILED TO START

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Description:

Field jdbcTemplate in com.lmy.demo.service.UserService required a bean of type 'org.springframework.jdbc.core.JdbcTemplate' that could not be found.

The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'org.springframework.jdbc.core.JdbcTemplate' in your configuration.

Answer 1

有添加数据源配置吗？
解决方案：

在运行类中加入如下代码，DateSource这块看自己的数据源，我这边用的是阿里的druid

[java] view plain copy

package com.gwd;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.Bean;

import org.springframework.core.env.Environment;

import com.alibaba.druid.pool.DruidDataSource;

@SpringBootApplication

public class SpringBootTestApplication {

public static void main(String[] args) {

SpringApplication.run(SpringBootTestApplication.class, args);

}

@Autowired  
private Environment env;  

//destroy-method="close"的作用是当数据库连接不使用的时候,就把该连接重新放到数据池中,方便下次使用调用.  
@Bean(destroyMethod =  "close")  
public DataSource dataSource() {  
    DruidDataSource dataSource = new DruidDataSource();  
    dataSource.setUrl(env.getProperty("spring.datasource.url"));  
    dataSource.setUsername(env.getProperty("spring.datasource.username"));//用户名  
    dataSource.setPassword(env.getProperty("spring.datasource.password"));//密码  
    dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));  
    dataSource.setInitialSize(2);//初始化时建立物理连接的个数  
    dataSource.setMaxActive(20);//最大连接池数量  
    dataSource.setMinIdle(0);//最小连接池数量  
    dataSource.setMaxWait(60000);//获取连接时最大等待时间，单位毫秒。  
    dataSource.setValidationQuery("SELECT 1");//用来检测连接是否有效的sql  
    dataSource.setTestOnBorrow(false);//申请连接时执行validationQuery检测连接是否有效  
    dataSource.setTestWhileIdle(true);//建议配置为true，不影响性能，并且保证安全性。  
    dataSource.setPoolPreparedStatements(false);//是否缓存preparedStatement，也就是PSCache  
    return dataSource;  
}  

}