Spring(2)

date
[TOC]

InputStreamSource 接口的实现层次

public interface InputStreamSource {
    InputStream getInputStream() throws IOException;
}

public interface Resource extends InputStreamSource {
    boolean exists();
    boolean isReadable();
    boolean isOpen();
    URL getURL() throws IOException;
    URI getURI() throws IOException;
    File getFile() throws IOException;
    long contentLength() throws IOException;
    long lastModified() throws IOException;
    Resource createRelative(String relativePath) throws IOException;
    String getFilename();
    String getDescription();
}

Resource接口封闭底层资源，InputStreamSource接口只有一个得到InputStream的方法，所有实现都可以使用InputStream接收。InputStreamSource不管如何实现，具体实现交给了各个子类，给子类充分的自由。而真正处理资源的子类实现的是Resource接口，Resource接口声明了子类的一些约定方法。（接口其实就是一种约定）

InputStreamSource的继承结构 Resource接口的实现类

XmlBeanFactory 得到Bean

idea安装SequencePlugin(直到写本篇文章时，SequencePlugin的version为1.3.0)

idea查看调用的时序图 MyTestBean的时序图

MyTestBean.java

package edu.cninfo.vo;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

/**
 * @author chenxinwei
 * create 2019-08-12 15:53
 */
public class MyTestBean {
    private String str = "This is my test Bean";

    public String getStr() {
        return str;
    }

    public void setStr(String str) {
        this.str = str;
    }

    @Override
    public String toString() {
        return super.toString();
    }

    public static void main(String[] args) {
        Resource resource = new ClassPathResource("myTestBean.xml", MyTestBean.class);
        BeanFactory bf = new XmlBeanFactory(resource);
        final MyTestBean bean = bf.getBean(MyTestBean.class);
        System.out.println(bean.getStr());

    }
}

myTestBean.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="myTestBean" class="edu.cninfo.vo.MyTestBean">
        <property name="str" value="hello"/>
    </bean>
</beans>

代码Resource resource = new ClassPathResource("myTestBean.xml", MyTestBean.class);使用实例时，将第一个参数使用StringUtils.cleanPath(param1)的结果给path属性赋值

StringUtils.cleanPath 清理目录操作
说明： 代码调试的时候看到StringUtils.cleanPath，搜索到工程中的单元测试类StringUtilsTest，定位到相应的测试方法下，看cleanPath的功能。

    public void testCleanPath() {
        assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/myfile"));
        assertEquals("mypath/myfile", StringUtils.cleanPath("mypath\\myfile"));
        assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/../mypath/myfile"));
        assertEquals("mypath/myfile", StringUtils.cleanPath("mypath/myfile/../../mypath/myfile"));
        assertEquals("../mypath/myfile", StringUtils.cleanPath("../mypath/myfile"));
        assertEquals("../mypath/myfile", StringUtils.cleanPath("../mypath/../mypath/myfile"));
        assertEquals("../mypath/myfile", StringUtils.cleanPath("mypath/../../mypath/myfile"));
        assertEquals("/../mypath/myfile", StringUtils.cleanPath("/../mypath/myfile"));
        assertEquals("/mypath/myfile", StringUtils.cleanPath("/a/:b/../../mypath/myfile"));
        assertEquals("file:///c:/path/to/the%20file.txt", StringUtils.cleanPath("file:///c:/some/../path/to/the%20file.txt"));
    }

Spring 中使用Schema对xml进行校验

在Java中如何启用Schema对XML文档校验