HI我有一個簡單的Java Spring IO項目,其中類應該從csv文件中讀取,並且對於每個記錄讀取,參數都存儲在一個帳戶對象列表中。 我正在使用強制IDE Luna,讀取文件的類CsvAccountDao與xml文件的第一個bean中定義的csv文件位於同一個包中。 xml文件也位於相同的包中。這裏是Bean文件:Spring中的類路徑探針:未找到文件異常
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="https://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean id="accountDao"
class="com.springinpractice.ch01.model.dao.csv.CsvAccountDao">
<property name="csvResource" value="accounts.csv"></property>
</bean>
<bean id="accountService"
class="com.springinpractice.ch01.service.AccountService">
<property name="accountDao" ref="accountDao"</property>
</bean>
</beans>
,這裏是類文件CscAccountDao:
package com.springinpractice.ch01.model.dao.csv;
import java.io.BufferedReader;
import java.io.FileReader;
import java.math.BigDecimal;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.core.io.Resource;
import com.springinpractice.ch01.model.Account;
import com.springinpractice.ch01.model.dao.AccountDao;
public class CsvAccountDao implements AccountDao {
private Resource csvResource;
public CsvAccountDao() {
// TODO Auto-generated constructor stub
}
public void setCsvResource(Resource csvFile){
this.csvResource = csvFile;
}
@Override
public List<Account> findAll() throws Exception {
List<Account> results = new ArrayList<Account>();
DateFormat fmt = new SimpleDateFormat("MMddyyyy");
BufferedReader br = new BufferedReader(
new FileReader(csvResource.getFile()));
String line;
while((line = br.readLine()) != null){
String[] fields = line.split(",");
String accountNo = fields[0];
BigDecimal balance = new BigDecimal(fields[1]);
Date lastPaidOn = fmt.parse(fields[2]);
Account account =
new Account(accountNo, balance, lastPaidOn);
results.add(account);
}
br.close();
return results;
}
}
記下方法setCsvResource CSV文件分配給資源對象是異常的問題開始的地方。我得到的堆棧跟蹤,說一個異常錯誤:
Jun 20, 2015 7:59:42 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.s[email protected]177e4b0: defining beans [accountDao,accountService]; root of factory hierarchy
Exception in thread "main" java.io.FileNotFoundException: class path resource [accounts.csv] cannot be resolved to URL because it does not exist
Q)是否有一個問題,我將不得不更新,其中第一豆加入了全路徑使用accounts.csv XML文件?既然類,xml和csv文件都在同一個包中,我認爲我不需要更具體。謝謝
謝謝
檢查此http:// stackoverflow。com/questions/7484594/spring-3-0-inject-files-as-resources – Satya
謝謝Satya我將該軟件包添加到我的應用程序COntext XML文件中的account.csv文件中,並且它工作正常。 – user1548875