如何autowired sqlMapClient到Dao对象中，解决这个问题`java.lang.IllegalArgumentException: Property 'sqlMapClient' is required`。参考文章: 1. http://edwin.baculsoft.com/2010/08/yet-another-simple-swing-spring-and-ibatis-integration-example/ 2. http://stackoverflow.com/questions/3807707/injecting-derived-property-for-repository-bean-without-autowired-in-super-clas

ApiDao.java

@Repository
public class ApiDao extends SqlMapClientDaoSupport {

    // empty constructor
    public ApiDao() {       
    }
      
    // autowired constructor
    // i dont know why, but i cant autowired sqlMapClient directly
    // it will cause  java.lang.IllegalArgumentException: Property 'sqlMapClient' is required
    @Autowired
    public ApiDao(SqlMapClient sqlMapClient) { 
        setSqlMapClient(sqlMapClient);
    }
    
    // ... 
}

BaseDao.java

/**
 * 也可以通过基类的方式实现
 */
package me.arganzheng.study.common;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;

import com.ibatis.sqlmap.client.SqlMapClient;

@SuppressWarnings("deprecation")
public class BaseDao extends SqlMapClientDaoSupport {

    @Autowired(required = true)
    @Qualifier("sqlMapClient")
    public void setSqlMapClientWorkaround(SqlMapClient sqlMapClient) {
        this.setSqlMapClient(sqlMapClient);
    }
}

spring-biz-context.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
	    xsi:schemaLocation="
	        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
	        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
	        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	
	<context:annotation-config />
	<context:component-scan base-package="me.arganzheng.study" >
		<context:exclude-filter type="regex" 
			expression="me.arganzheng.study.controller.*" />		
	</context:component-scan>
		
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location">
			<value>classpath:db_${config_env}.properties</value>
		</property>
	</bean>
    
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
      	<property name="driverClassName" value="${driverClassName}" />  
        <property name="url" value="${url}" />  
        <property name="username" value="${username}" />  
        <property name="password" value="${password}" />  
   	 </bean>   
 
    <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">  
        <property name="configLocation" value="classpath:ibatis-config.xml" />
        <property name="dataSource" ref="dataSource" />
    </bean>  
    
</beans>