项目中的编码问题：
案例：content-type作用
package com.servlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 案例：content-type作用
* @author zhiyong
*
*/
public class ResponseDemo4 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
/*
* 设置响应实体内容的编码
*/
// response.setCharacterEncoding("utf-8");
/*
* 1.服务器发送给浏览器的数据类型
*/
// response.setContentType("text/xml; charset=utf-8");
response.setContentType("text/html; charset=utf-8");
// response.getWriter().write("<html><head><title>这是标题</title></head><body>这里是body的内容</body></html>");
response.getOutputStream().write("<html><head><title>这是标题</title></head><body>这里是body的内容</body></html>".getBytes("utf-8"));
/*
* 下载图片
*/
/* File file = new File("f:/cool.png");
* 设置头，以下载方式打开文件
response.setHeader("content-disposition", "attachment; filename=" + file.getName());
* 发送图片，字节
response.setContentType("image/png");
FileInputStream in = new FileInputStream(file);
byte[] buff = new byte[1024];
int len = 0;
//把图片的内容写出到浏览器
while((len = in.read(buff)) != -1){
response.getOutputStream().write(buff, 0, len);
}*/
}
}
