在java中编写大型文本文件的最有效方法是什么？

Question

我想用这个来写数据的一定量的文件：

public static <T extends SomeClass> void writeFile(String buffer, Class<T> clazz, int fileNumber) { 
    String fileType = ".txt"; 
    File file = new File(clazz.getName()+fileNumber+fileType); 
    PrintWriter printWriter = null; 


    try { 
     FileWriter writer = new FileWriter(file); 
     printWriter = new PrintWriter(writer); 
     printWriter.print(buffer);//error occurs here 
     printWriter.flush(); 
     printWriter.close(); 
     System.out.println("created file: "+file.getName()); 


    } catch (IOException e) { 
     e.printStackTrace(); 
    } finally{ 
     if(printWriter!=null){ 
      printWriter.flush(); 
      printWriter.close(); 
     } 
    } 
    System.out.println("Done!"); 
} 

缓冲区字符串包含数据+ -6mb，当我运行的代码我收到java.lang.OutOfMemoryError准确在缓冲区中。

Answer 1

由于6MB与其说是 “数据”，我认为你应该增加你的Java虚拟机的内存，

看看这里

http://confluence.atlassian.com/display/DOC/Fix+Out+of+Memory+Errors+by+Increasing+Available+Memory

Answer 2

什么用替换printWriter.print(buffer);：

for (int i = 0; i < buffer.length; i += 100) { 
    int end = i + 100; 

    if (end >= buffer.length) { 
     end = buffer.length; 
    } 

    printWriter.print(buffer.substring(i, end); 
    printWriter.flush(); 
}