春天的JdbcTemplate拋出：IllegalArgumentException：數據源需要

嗯，我有配置Spring的JdbcTemplate正常工作的問題。我正在嘗試注入數據源，但似乎它始終爲空。下面是一個示例代碼：春天的JdbcTemplate拋出：IllegalArgumentException：數據源需要

applicationContext.xml中：

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
<property name="driverClassName" value="org.apache.derby.jdbc.EmbeddedDriver" /> 
<property name="url" 
    value="jdbc:derby:c:\\Derby\\MyDB\\jsfkickstart;create=true" /> 
<property name="username" value="admin" /> 
<property name="password" value="admin" /> 
</bean> 

<bean id="employeeDoa" class="com.kickstart.employeeapp.doa.EmployeeDoa"> 
    <property name="dataSource" ref="dataSource" /> 
</bean>

的web.xml

<context-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>/WEB-INF/applicationContext.xml</param-value>

EmployeeDoa.java

public class EmployeeDoa implements IEmployeeDoa, IDepartmentDoa { 
private DataSource dataSource; 
     public List<Employee> getAllEmployees() { 
     JdbcTemplate select = new JdbcTemplate(dataSource); 
     return select.query(
       "SELECT "+ 
        "e.ID as empId, "+ 
        "e.FIRSTNAME as empFirstName, "+ 
        "e.LASTNAME as empLastName, "+ 
        "d.ID as depId, "+ 
        "d.NAME as depName, "+ 
        "d.LOCATION as depLocation "+ 
       "FROM jsfkickstart.Employee e, jsfkickstart.Department d", 
       new EmployeeMapper()); 
     } 
} 

class EmployeeMapper implements RowMapper { 
    public Object mapRow(ResultSet rs, int rowNum) throws SQLException { 
     Employee emp = new Employee(); 
     emp.setId(rs.getInt("empId")); 
     emp.setFirstName(rs.getString("empFirstName")); 
     emp.setLastName(rs.getString("empLastName")); 
     Department dep = new Department(); 
     dep.setId(rs.getShort("depId")); 
     dep.setLocation(rs.getString("depLocation")); 
     dep.setName(rs.getString("depName")); 
     emp.setDepartment(dep); 
     return emp; 
    } 
}

拋出異常：

Exception in thread "main" java.lang.IllegalArgumentException: Property 'dataSource' is required 
at org.springframework.jdbc.support.JdbcAccessor.afterPropertiesSet(JdbcAccessor.java:134) 
at org.springframework.jdbc.core.JdbcTemplate.<init>(JdbcTemplate.java:142) 
at com.kickstart.employeeapp.doa.EmployeeDoa.addEmployee(EmployeeDoa.java:29)

有誰知道我怎麼能解決這個問題呢？如果我錯過了問題中的任何重要信息，請告訴我。

謝謝。

來源

2010-01-28 fouad

給com.kickstart.employeeapp.doa.EmployeeDoa的代碼（至少在類聲明） – Bozho 2010-01-28 11:32:50

加入！謝謝Bazho。 – fouad 2010-01-28 11:52:32

我其實是一個非常愚蠢的例外。 setDataSource（）的主體是空的，即我沒有將dataSource賦值給任何東西，所以它始終爲空。

愚蠢的我！

來源

2010-01-28 12:19:16 fouad

我打算說我根本沒有看到setDataSource（）方法。 – Matt 2010-01-28 19:41:20

是非常愚蠢的;） – Mils 2013-03-05 22:54:12

春天的JdbcTemplate拋出：IllegalArgumentException：數據源需要

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