jsp中print和write区别和共同点

来源：互联网发布：idc销售源码编辑：程序博客网时间：2024/06/05 14:30

try {
            PrintWriter pw = response.getWriter();

            int x = 98;

            pw.write(x);

            pw.print(x);

        } catch (IOException e) {
            e.printStackTrace();
        }
try {
   PrintWriter pw = response.getWriter();

共同点：

     两者都不刷新页面，只在原来的页面写数据
   int x = 98;

   pw.write(x);

   pw.print(x);

  } catch (IOException e) {
   e.printStackTrace();
  }

输出：b 98

最终都是重写了抽象类Writer里面的write方法
print方法可以将各种类型的数据转换成字符串的形式输出。重载的write方法只能输出字符、字符数组、字符串等与字符相关的数据。
查看一下源码(java.io.PrintWriter)：

1：write方法：

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public void write(int c) {
try {
    synchronized (lock) {
ensureOpen();
out.write(c);
    }
}
catch (InterruptedIOException x) {
    Thread.currentThread().interrupt();
}
catch (IOException x) {
    trouble = true;
}
   }
public void write(int c) {
try {
     synchronized (lock) {
ensureOpen();
out.write(c);
     }
}
catch (InterruptedIOException x) {
     Thread.currentThread().interrupt();
}
catch (IOException x) {
     trouble = true;
}
    }

2：print方法：

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public void print(int i) {
rite(String.valueOf(i));
}