春季启动应用显示???字符而不是unicode

Question

从数据库读取时，我的dao类中的日志显示垃圾字符代替unicode字符。 Sql开发人员从oracle数据库显示正确的值也正确在数据库上设置NLS语言编码。

下面的代码适用于标准的jdbc：

connection = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:xe", "adminuser", "oracle");
Statement st=connection.createStatement();
ResultSet res=st.executeQuery("SELECT menu_item_name from pending_menu_item 
where menu_item_id=6062");

    while(res.next()){
        System.out.println("itemName: "+res.getString(1));
    }

下面是春季启动项目的网址，显示垃圾字符，我上传到github.qazxsw poi

https://github.com/AyubOpen/spring-boot-jdbc/

Answer 1

1. 在

   package com.mkyong;
   
   import com.mkyong.dao.CustomerRepository;
   import com.zaxxer.hikari.HikariDataSource;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.boot.CommandLineRunner;
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.jdbc.core.JdbcTemplate;
   import javax.sql.DataSource;
   import java.util.List;
   import static java.lang.System.exit;
   
   @SpringBootApplication
   public class SpringBootConsoleApplication implements CommandLineRunner {
   
   @Autowired
   DataSource dataSource;
   
   @Autowired
   private CustomerRepository customerRepository;
   
   @Autowired
   private JdbcTemplate jdbcTemplate;
   
     public static void main(String[] args) throws Exception {
         SpringApplication.run(SpringBootConsoleApplication.class, args);
   }
   
   @Override
   public void run(String... args) throws Exception {
   
   // If you want to check the HikariDataSource settings
    HikariDataSource newds = (HikariDataSource)dataSource;
     System.out.println("getMaximumPoolSize = " + ((HikariDataSource) 
     dataSource).getMaximumPoolSize());
     System.out.println("DATASOURCE = " + 
     newds.getDataSourceProperties().getProperty("hikari.useUnicode"));
   
     if (args.length <= 0) {
       System.err.println("[Usage] java xxx.jar {display}");
      } else {
           if (args[0].equalsIgnoreCase("display")) {
           System.out.println("Display items...");
           List<String> list = customerRepository.findAll();
           list.forEach(x -> System.out.println(x));
         }
         System.out.println("Done!");
      }
     exit(0);
    }
   }
   
   package com.mkyong.dao;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.jdbc.core.JdbcTemplate;
   import org.springframework.stereotype.Repository;
   import java.util.List;
   
   @Repository
   public class CustomerRepository {
   
      @Autowired
      private JdbcTemplate jdbcTemplate;
   
      public List<String> findAll() {
   
       List<String> result = jdbcTemplate.query(
           "SELECT menu_item_name from pending_menu_item where 
               menu_item_id=6062",
           (rs, rowNum) -> rs.getString("menu_item_name")
       );
     return result;
     }
   }
   
   application.properties  
   ----------------------
   spring.main.banner-mode=off
   spring.datasource.initialize=true
   spring.datasource.type=com.zaxxer.hikari.HikariDataSource
   spring.datasource.url=jdbc:oracle:thin:@localhost:1521/xe
   spring.datasource.username=jahezdbapp
   spring.datasource.password=oracle
   spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver 
   spring.datasource.hikari.useUnicode=true
   spring.datasource.hikari.characterEncoding=utf-8 
   spring.datasource.hikari.characterSetResults=utf8 
   
   # HikariCP settings
   #60 sec
   spring.datasource.hikari.connection-timeout=60000
   # max 5
   spring.datasource.hikari.maximum-pool-size=5

   结束时添加?useUnicode=yes&characterEncoding=UTF-8。
2. 在spring.datasource.url设置spring.datasource.sqlScriptEncoding=UTF-8

1本身应解决问题，2可能没有必要。

Answer 2

这个问题似乎与jdbc数据源不一样，我将为springboot创建一个简单的github项目，并在此问题上跟进以下问题：

application.properties

Answer 3

记录：DB2的工作URL，jdb

JDBC：DB2：//x.x.x.x：5010 / XXXX：了useUnicode =是;的characterEncoding = UTF-8;