小编Tir*_*ean的帖子

我用 JdbcTemplate 实现了 ItemReader 。

问题是read()在无限循环中被调用。

public class MyReader implements ItemReader<Col>, InitializingBean {
    private JdbcTemplate jdbcTemplate;
    private RowMapper<Col> rowMapper;
    private String sql;
    private DataSource dataSource;

public Col read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
     Col col = jdbcTemplate.queryForObject(sql,null, rowMapper);            
     return col;
    }

}

Spring批量配置：

<chunk reader="itemReader" writer="itemWriter"
            processor="itemProcessor" commit-interval="1" />


<bean id="itemReader"
    class="batch.MyReader"
    scope="step">
    <property name="dataSource" ref="dataSource" />
    <property name="sql" value="#{stepExecutionContext[sql]}" />
    <property name="rowMapper">
        <bean class="batch.ColMapper" />
    </property>
</bean>

当我Composite在内部嵌入控件时ViewPart,在文本框和按钮之间添加了一个垂直边距/填充(按钮是另一个复合的一部分),如附图所示.

我该如何删除它？

public class View extends ViewPart {
    public static final String ID = "xyyx.view";

    public void createPartControl(Composite parent) {

        GridLayout layout = new GridLayout(1, false);
        parent.setLayout(layout);


        Text infoText = new Text(parent, SWT.BORDER);

        GridData gridDataInfo = new GridData();
        gridDataInfo.horizontalSpan = 1;
        gridDataInfo.grabExcessHorizontalSpace = true;
        gridDataInfo.horizontalAlignment = GridData.FILL;
        infoText.setLayoutData(gridDataInfo);       

        new NewComposite(parent, SWT.NONE);         

    }

    public class NewComposite extends Composite{

        public NewComposite(Composite parent, int style) {
            super(parent, style);           

            GridLayout layout = new GridLayout(1, false);
            setLayout(layout);      

            Button btn = new …

我有 Spring 批处理作业使用的 pojo 类。

public class DataItem{
    String key;
    CellType type; //Enum
    String name;

    private XSSFCell cell; //org.apache.poi.xssf.usermodel.XSSFCell


   //getters setters omitted
}

当我尝试运行批处理作业时，出现以下异常：

java.lang.IllegalArgumentException: Failed to serialize object of type: class org.springframework.batch.core.JobExecution
    at org.springframework.util.SerializationUtils.serialize(SerializationUtils.java:49)
    at org.springframework.batch.core.repository.dao.MapJobExecutionDao.copy(MapJobExecutionDao.java:50)
    at org.springframework.batch.core.repository.dao.MapJobExecutionDao.updateJobExecution(MapJobExecutionDao.java:104)
    at org.springframework.batch.core.repository.support.SimpleJobRepository.update(SimpleJobRepository.java:162)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:351)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
    at  com.excelreader.AppMain.run(AppMain.java:35)
    at  com.excelreader.AppMain.main(AppMain.java:16)
Caused by: java.io.NotSerializableException: com.excelreader.pojo.DataItem