HTTP Servlet Response设置响应体、发送中文、图片(页码SR2)

桃扇骨 2023-07-07 11:09 85阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70 2]  
想要使用中文需要设置编码、解码方式

package cn.aynortechnology.content;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class TextServlet extends HttpServlet {
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		
    		//writer.write("text");
    		//设置response查询的码表
    		//response.setCharacterEncoding("UTF-8");	
    		PrintWriter writer = response.getWriter();
    		//通过一个头Content-Type告知客户端使用何种码表进行解码
    		//response.setHeader("Content-Type", "text/html;charset=UTF-8");
    		response.setContentType("text/html;charset=UTF-8");
    		writer.write("中国");
    	}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doGet(request, response);
    	}
    }

![在这里插入图片描述][20200222210757206.png]  
用OutputStream输出字节流(此处以图片为例)

package cn.aynortechnology.content;
    
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    import javax.servlet.ServletException;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class ByteServlet extends HttpServlet {
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		//使用response获得一个字节输出流
    		ServletOutputStream out = response.getOutputStream();
    		
    		//获得服务器上的图片
    		String realPath = this.getServletContext().getRealPath("土味照片1.jpg");
    		InputStream in = new FileInputStream(realPath);
    		int len = 0;
    		byte[] buffer = new byte[1024];
    		while((len=in.read(buffer))>0) {
    			out.write(buffer, 0, len);
    		}
    		in.close();
    		out.close();
    	}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doGet(request, response);
    	}
    }

[(页码SR1)HTTP Servlet Response设置响应头、重定向、定时刷新][SR1_HTTP Servlet Response]  
[(页码SR2)HTTP Servlet Response设置响应体、发送中文、图片][SR2_HTTP Servlet Response]  
[(页码SR3)HTTP Servlet Response文件下载基本代码][SR3_HTTP Servlet Response]  
[(页码SR4)HTTP Servlet Response一次性验证码的实现][SR4_HTTP Servlet Response]  
整合：HTTP Servlet Response完成文件下载、一次性验证码的实现

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200222190952999.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200222210726548.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200222193149643.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1,size_16,color_FFFFFF,t_70
[20200222210757206.png]: https://img-blog.csdnimg.cn/20200222210757206.png
[SR1_HTTP Servlet Response]: https://blog.csdn.net/qq_40922845/article/details/104444704
[SR2_HTTP Servlet Response]: https://blog.csdn.net/qq_40922845/article/details/104448580
[SR3_HTTP Servlet Response]: https://blog.csdn.net/qq_40922845/article/details/104452337
[SR4_HTTP Servlet Response]: https://blog.csdn.net/qq_40922845/article/details/104460218