Ibatis中如何读取sqlMapConfig.xml文件

1.Reader reader = Resources.getResourceAsReader("sqlMapConfig.xml");

// 函数返回一个reader,输入的是相关的xml文件的签名.

 

 

2.getResourceAsReader("sqlMapConfig.xml");

 

 Reader reader;
    if (charset == null) {
      reader = new InputStreamReader(getResourceAsStream(resource));
    } else {
      reader = new InputStreamReader(getResourceAsStream(resource), charset);

 

 

//调用了 getResourceAsStream(),通过字节流读取xml

 

3. getResourceAsStream(resource)

return getResourceAsStream(getClassLoader(), resource);

//重载调用(ClassLoader loader,String resource)  以得到确切的输入流

 

 

4.返回相关的流实例变量

InputStream in = null;
    if (loader != null) in = loader.getResourceAsStream(resource);
    if (in == null) in = ClassLoader.getSystemResourceAsStream(resource);
    if (in == null) throw new IOException("Could not find resource " + resource);
    return in;