Question

我已经通过与mySQL DB的连接实现了SpringFlex 1.5 它最初工作和检索数据，但是当我输入无效数据时应用程序似乎冻结了我的表中不存在的数据甚至没有输入有效的数据后，我需要停止并再次启动Tomcat以使其再次运行

的applicationContext.xml

<bean id="authToLeaveService" class="com.model.atl.AuthToLeaveServiceImpl">
    <constructor-arg ref="dataSource" />        
</bean>

<bean id="dataSource" 
     class="org.apache.commons.dbcp.BasicDataSource">

    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://dxfcm:3306/wookie?autoReconnect=true&amp;zeroDateTimeBehavior=convertToNull"/>
    <property name="username" value="darth" />
    <property name="password" value="vader" />
    <property name="validationQuery" value="SELECT 1"/>
</bean>

MyView的

<fx:Declarations>       
    <s:ChannelSet id="cs">
        <s:AMFChannel url="http://localhost:8400/flexspring/messagebroker/amf"/>
    </s:ChannelSet>     
    <s:RemoteObject id="atlRO" channelSet="{cs}" destination="authToLeaveService"/> 
</fx:Declarations>


[Bindable]
private var job:AtlJob;

private function onEnter(event:FlexEvent):void
{
    var token:AsyncToken = atlRO.findByBarcode(this.txtBarcode.text);
    token.addResponder(new AsyncResponder(onResult, onFault));
} 

private function onResult(event:ResultEvent, token:Object):void
{ job = event.result as AtlJob; }

private function onFault(event:FaultEvent, token:Object):void
{ }


<s:TextInput id="txtBarcode" x="23" y="60" width="218"
    enter="onEnter(event)" maxChars="16"/>

AltJob.as

[Bindable]
[RemoteClass (alias="com.model.atl.AtlJob")]
public class AtlJob
{
public var barcode:String;
public var pieces:int;
public var customerName:String;
}

AtlJob.java 包com.model.atl;

public class AtlJob实现了java.io.Serializable {

private static final long serialVersionUID = 1L;

private String barcode;
private String customerName;
private int pieces;

public AtlJob() {   }

public AtlJob(String barcode, int pieces, String customerName) {
    this.barcode = barcode;

    this.customerName = customerName;
    this.pieces= pieces;
}

定义了Getters和Setter

@Service("authToLeaveService")
@RemotingDestination(channels = { "my-amf", "my-secure-amf" })
public class AuthToLeaveServiceImpl implements AuthToLeaveService {

private final DataSource dataSource;

public AuthToLeaveServiceImpl(DataSource dataSource) {
    this.dataSource = dataSource; }

@RemotingInclude
public AtlJob findByBarcode(String barcode) {
AtlJob job = new AtlJob();
Connection con = null;

final String sql = "SELECT * FROM atl_job WHERE card_barcode = ?";

try {
    con = this.dataSource.getConnection();
    PreparedStatement ps = con.prepareStatement(sql);
    ps.setString(1, barcode);
    ResultSet rs = ps.executeQuery();

if (rs.next()) {
    job.setBarcode(rs.getString("barcode"));
    job.setPieces(rs.getInt("pieces"));
    job.setCustomerName(rs.getString("customerName"));}
} catch (SQLException e) {
    e.printStackTrace();
throw new RuntimeException(e);
} finally {
if (con!=null) {try { con.close();
} catch (SQLException e) {
e.printStackTrace();
} }} return job; }

Answer 1

如果没有像这里找到记录那么你不会抛出任何例外

...
if (rs.next()) {
  job.setBarcode(rs.getString("barcode"));
  job.setPieces(rs.getInt("pieces"));
  job.setCustomerName(rs.getString("customerName"));
}
// Put an else clause here and throw exception
else
{
  throw new Exception("Record Not found"); 
}

尝试在faultMethod ..

中显示捕获的异常

 private function onFault(event:FaultEvent, token:Object):void   
 { 
    //Handle Fault event here Put some Alert here
 }

Flex 4，Spring 3 BlazeDS4 mySQL dbcp查询执行

1 个答案: