我是春天的新手。我的问题是如何将从数据库加载的值（来自 db 的业务单位的动态列表）注入另一个 bean 以进行某些处理。
我正在从我的代码中执行以下操作。
/*** Sample code Starts here ****/
/* 使用加载方法从数据库中加载业务单元 */
public class BusinessUnitDaoImpl implements BusinessUnitDao {
private JdbcTemplate jdbctemplate;
public BusinessUnitDaoImpl() {
super();
}
public BusinessUnitDaoImpl(DataSource ds) {
this.jdbctemplate=new JdbcTemplate(ds);
}
@Override
public List<BusinessUnit> load() {
String SQL = "select * from business_unit";
List<BusinessUnit> businessunits = jdbctemplate.query(SQL,
new BusinessUnitRowMapper());
return businessunits;
}
}
/* 业务单元行映射器 */
public class BusinessUnitRowMapper implements RowMapper<BusinessUnit> {
public BusinessUnitRowMapper() {
// TODO Auto-generated constructor stub
}
public BusinessUnit mapRow(ResultSet rs, int rowNum) throws SQLException {
BusinessUnit bunit = new BusinessUnit();
bunit.setBusinessUnitId(rs.getInt("business_unit_id"));
bunit.setBusinessUnitDesc(rs.getString("business_unit_desc"));
bunit.setCurrencyCode(rs.getString("currency_code"));
return bunit;
}
}
/* 业务单元 VO */
public class BusinessUnit {
private int businessUnitId;
private String businessUnitDesc;
private String currencyCode;
public BusinessUnit() {
super();
}
public int getBusinessUnitId() {
return businessUnitId;
}
public void setBusinessUnitId(int businessUnitId) {
this.businessUnitId = businessUnitId;
}
public String getBusinessUnitDesc() {
return businessUnitDesc;
}
public void setBusinessUnitDesc(String businessUnitDesc) {
this.businessUnitDesc = businessUnitDesc;
}
public String getCurrencyCode() {
return currencyCode;
}
public void setCurrencyCode(String currencyCode) {
this.currencyCode = currencyCode;
}
@Override
public String toString() {
return "BusinessUnit [businessUnitId=" + businessUnitId
+ ", businessUnitDesc=" + businessUnitDesc + ", currencyCode="
+ currencyCode + "]";
}
}
/* 一些Service，调用dao加载业务单元*/
public class HarmonyService {
private BusinessUnitDao budao;
private RequestDetails requestDetails;
public HarmonyService(BusinessUnitDao budao,RequestDetails requestDetails) {
this.budao=budao;
this.requestDetails=requestDetails;
}
public List<BusinessUnit> show() {
return budao.load();
}
public WFRequest getDetail(long requestId) {
return requestDetails.load(requestId);
}
}
春天的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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:property-placeholder location="file:${databaseConfiguration}"/>
<bean id="AmericasDataSource" class="dell.harmony.data.HarmonyBasicDataSource" destroy-method="close" >
<property name="url"><value>${HarmonyAmericasDb.url}</value></property>
<property name="driverClassName"><value>${HarmonyAmericasDb.driverClassName}</value></property>
<property name="username"><value>${HarmonyAmericasDb.username}</value></property>
<property name="password"><value>${HarmonyAmericasDb.password}</value></property>
<property name="removeAbandoned"><value>${HarmonyAmericasDb.removeAbandoned}</value></property>
<property name="initialSize"><value>${HarmonyAmericasDb.initialSize}</value></property>
<property name="maxActive"><value>${HarmonyAmericasDb.maxActive}</value></property>
</bean>
<bean id="EMEADataSource" class="dell.harmony.data.HarmonyBasicDataSource" destroy-method="close" >
<property name="url"><value>${HarmonyEMEADb.url}</value></property>
<property name="driverClassName"><value>${HarmonyEMEADb.driverClassName}</value></property>
<property name="username"><value>${HarmonyEMEADb.username}</value></property>
<property name="password"><value>${HarmonyEMEADb.password}</value></property>
<property name="removeAbandoned"><value>${HarmonyEMEADb.removeAbandoned}</value></property>
<property name="initialSize"><value>${HarmonyEMEADb.initialSize}</value></property>
<property name="maxActive"><value>${HarmonyEMEADb.maxActive}</value></property>
</bean>
<bean id="budao" class="test.dao.BusinessUnitDaoImpl">
<constructor-arg index="0"><ref bean="AmericasDataSource"/></constructor-arg>
</bean>
<bean id="requestdao" class="test.dao.RequestDetailImpl">
<constructor-arg index="0"><ref bean="AmericasDataSource"/></constructor-arg>
</bean>
<bean id="service" class="test.service.HarmonyService">
<constructor-arg index="0"><ref bean="budao"/></constructor-arg>
<constructor-arg index="1"><ref bean="requestdao"/></constructor-arg>
</bean>
</beans>
/* 用于测试弹簧的测试应用程序 */
public class MyApp {
public static void main(String args[]) {
ApplicationContext context =
new ClassPathXmlApplicationContext("Spring-All-Module.xml");
HarmonyService hservice = (HarmonyService) context.getBean("service");
System.out.println(hservice.show());
System.out.println(hservice.getDetail(13090000000001L));
}
}
/*** Sample code ends here ****/
问题：
如果假设，我想从服务 HarmonyService 的加载方法中注入业务单位列表，该怎么做？
假设我有一个处理器类，比如下面的 BatchProcessor。
public class BatchProcessor {
public List<BusinessUnit> proces(List<BusinessUnit> businessUnitList ) {
//do some processing here.
}
}
如何使用spring xml将动态创建的businessUnit注入到本地方法变量businessUnitList中（请用java代码和spring xml更改说明）。
- 是否可以将动态列表注入到本地方法变量中。
- 举例说明如何将值注入到实例变量中，假设上面的 businessUnitList 是实例变量而不是方法局部变量。
问候， 拉古
我会接受上面的答案。
正如我之前所说，我对春天很陌生。当我探索 Stackoverflow 另一个问题时，我有了一个想法。
让我们假设 businessUnitList 作为一个实例变量。
public class BatchProcessor {
public BatchProcessor(List<BusinessUnit> businessUnitList) {
this.businessUnitList=businessUnitList;
}
private List<BusinessUnit> businessUnitList;
public List<BusinessUnit> getBusinessUnitList() {
return businessUnitList;
}
public void setBusinessUnitList(List<BusinessUnit> businessUnitList) {
this.businessUnitList = businessUnitList;
}
public List<BusinessUnit> process() {
System.out.println("Started processing the business Units" + businessUnitList);
//do some processing
return this.businessUnitList;
}
在 MyApp 主程序中，我可以做到这一点。
BatchProcessor bprocess = (BatchProcessor) context.getBean("bprocessor", hservice.show());
System.out.println(bprocess.process());
//context.getBean("bprocessor",hservice.show()); 这里我从 hservice.show 发送动态列表，它连接到数据库并获取业务单位列表。
现在，我将再次调用 BatchProcessor 的处理方法。
这是做事的好方法吗？
基本上，当我们想要动态传递一个值时，我们需要使用参数调用 contextbean。
我的春天 xml：
<!-- passing a dummy list to the constructor -->
<bean id="bprocessor" class="test.rules.BatchProcessor" scope="prototype">
<constructor-arg type="java.util.List">
<list>
<ref bean="bunit"/>
</list>
</constructor-arg>
我对吗？