jsp接收到的byte[]类型怎么转为png图片显示在页面上?
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用一个方法把byte[]写入命名的png文件中,然后放到web路径里,让jsp按照路径访问即可。
//将byte数组写入文件
public void createFile(String path, byte[] content) throws IOException { FileOutputStream fos = new FileOutputStream(path);
fos.write(content);
fos.close();
}
在jsp调用时例子:
createFile(application.getRealPath(''/images")+"/mypic.png"), yourBytes);
然后用<img src="images/mypic.png">就行。
2015-12-17 · 做真实的自己 用良心做教育
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jsp页面显示bye形式的图片的方法:
1.读取二进制图片在页面显示
//读取图片
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");
string strComm = " SELECT personPhoto FROM personPhoto WHERE personName='wangwu' ";
SqlCommand myComm = new SqlCommand(strComm, myConn);
myConn.Open();
SqlDataReader dr = myComm.ExecuteReader();
while (dr.Read())
{
byte[] photo = (byte[])dr["personPhoto"];
this.Response.BinaryWrite(photo);
}
dr.Close();
myConn.Close();
或
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");
SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn);
DataSet myds = new DataSet();
myConn.Open();
myda.Fill(myds);
myConn.Close();
byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"];
this.Response.BinaryWrite(photo);
2、显示图片:
this.Image1.ImageUrl = strPath;
1.读取二进制图片在页面显示
//读取图片
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");
string strComm = " SELECT personPhoto FROM personPhoto WHERE personName='wangwu' ";
SqlCommand myComm = new SqlCommand(strComm, myConn);
myConn.Open();
SqlDataReader dr = myComm.ExecuteReader();
while (dr.Read())
{
byte[] photo = (byte[])dr["personPhoto"];
this.Response.BinaryWrite(photo);
}
dr.Close();
myConn.Close();
或
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");
SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn);
DataSet myds = new DataSet();
myConn.Open();
myda.Fill(myds);
myConn.Close();
byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"];
this.Response.BinaryWrite(photo);
2、显示图片:
this.Image1.ImageUrl = strPath;
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