Servlet中字节字符流的输出

public class OutServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

//1字节流
ServletOutputStream out = response.getOutputStream();
out.print("Hello1");
//out.print("湖南城院");//不能以这种方式输出中文
out.write("湖南城市学院1".getBytes());


//2字符流
response.setContentType("text/html;charset=utf-8");//该句等价下面两句
//response.setContentType("text/html;");
//response.setCharacterEncoding("utf-8");//对字节流无效
PrintWriter out2 = response.getWriter();
out2.println("Hello2");
out2.println("湖南城市海陆空");


}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//1字节流
ServletOutputStream out = response.getOutputStream();
out.print("Hello1");
//out.print("湖南城院");//不能以这种方式输出中文
out.write("湖南城市学院1".getBytes());


//2字符流
response.setContentType("text/html;charset=utf-8");//该句等价下面两句
//response.setContentType("text/html;");
//response.setCharacterEncoding("utf-8");//对字节流无效
PrintWriter out2 = response.getWriter();
out2.println("Hello2");
out2.println("湖南城市海陆空");

}

}

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<a href="<%=request.getContextPath()%>/servlet/OutServlet">servlet中的两个输出流:字节流和字符流</a>
<form action="<%=request.getContextPath()%>/servlet/OutServlet" method="post">
姓名:<input type="text" name="name"/>
<input type="submit" value="提交">
</form>
<hr/>

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1、servlet中的两个输出流:字节流(response.getOutputStream()) 和字符流(response.getWriter())
1)用字节流输出时，中文要采用out.write("中文".getBytes())。 对于字节流，用response.setCharacterEncoding("utf-8")设了也不行。
2)用字符流输出时，无论中英文都是：out2.print(); //编码用 response.setContentType("text/html;charset=utf-8");
3）※※※两种流不能共存(无论是GET或POST方式提交): 用了字节流就不能同时用字符，反之变然!