基於spring的NamedParameterJdbcTemplate操作資料庫

1. 首先在 resources 資料夾下新增資料庫配置檔案jdbc.properties 配置常用的資料庫資訊

   1 consult.jdbc.driverClassName=com.mysql.jdbc.Driver
   2 consult.jdbc.url=jdbc:mysql://xxxxxxxx:3307/consult_summer?useUnicode=true&characterEncoding=utf-8&tinyInt1isBit=false
   3 consult.jdbc.username=root
    
   4 consult.jdbc.password=123456

    

2. 將配置檔案新增到集中載入的配置檔案中，即在applicationContext.xml檔案中新增如下內容

    1 <!-- 載入資原始檔，所有的資原始檔都集中載入，不要分散到其他spring配置檔案中，否則會找不到 -->
    2     <bean id="propertyConfigurer"
    3           class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    4
    
            <property name="ignoreUnresolvablePlaceholders" value="true" />
    5         <property name="locations">
    6             <list>
    7                 <value>classpath:jdbc.properties</value>
    8             </list>
    9         </property>
   10     </bean>

    
3. 然後在 applicationContext.xml 檔案中增加如下內容，用來對NamedParameterJdbcTemplate的bean 的引入

    1 <bean id="consultDataSource"
    2           class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    3         <property name="driverClassName" value="${consult.jdbc.driverClassName}" />
    4         <property name="url" value="${consult.jdbc.url}" />
    5         <property name="username" value="${consult.jdbc.username}" />
    6         <property name="password" value="${consult.jdbc.password}" />
    7     </bean>
    8 
    9     <bean id="consultTemplate"
   10           class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
   11         <constructor-arg ref="consultDataSource" />
   12     </bean>

    

4. 上面配置完成，下面開始寫一個測試類Testdemo來操作資料庫（以查詢為例）

    1 import org.apache.commons.logging.Log;
    2 import org.apache.commons.logging.LogFactory;
    3 import org.junit.Test;
    4 import org.junit.runner.RunWith;
    5 import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
    6 import org.springframework.test.context.ContextConfiguration;
    7 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    8 
    9 import javax.annotation.Resource;
   10 import java.util.HashMap;
   11 import java.util.List;
   12 import java.util.Map;
   13 import java.util.Set;
   14 
   15 @RunWith(SpringJUnit4ClassRunner.class)
   16 @ContextConfiguration(locations="classpath:applicationContext.xml")
   17 
   18 public class Testdemo {
   19 
   20     private static final Log log = LogFactory.getLog(TestJdbc.class);
   21 
   22     // 引入註解
   23     @Resource
   24     protected NamedParameterJdbcTemplate consultTemplate;
   25     @Test
   26     public  void test() throws Exception{
   27     
   28         StringBuffer sql = new StringBuffer("SELECT * FROM " + "order_info_ext_96"
   29                 + " WHERE 1=1 ");
   30         StringBuffer sqlToLog = new StringBuffer(sql);
   31         Map<String,Object> para=new HashMap<String, Object>();
   32         para.put("order_info_id","tm2zd0ww21190111030136219");
   33         Set<String> columnNames = para.keySet();
   34         for (String columnName : columnNames) {
   35             sql.append(" AND " + columnName + "=:" + columnName);
   36             sqlToLog.append(" AND " + columnName + "='"
   37                     + para.get(columnName) + "'");
   38         }
   39         List<Map<String, Object>> select_result=consultTemplate.queryForList(sql.toString(),para);
   40         log.info(select_result);  //列印查詢結果
   41 
   42     }
   43 }

    

5. 執行即可檢視結果，執行完成即可將方法改成引數式的，以供呼叫