Question

jsp从数据库中读取图片路径显示不出来

jsp代码：<img src="show.jsp?number=<%=0%>&type=hjdg_image" border="0"/>

show.jsp代码：
String num = request.getParameter("number");
int number = Integer.parseInt(num);
String type = request.getParameter("type");
if(type != null){
if(type.equals("hjdg_image")){
OutputStream outs = null;
try{
String dir = DBUtil.getHJDGImage(number);
} //try catch省略了

DBUtil.java代码：
public static String getHJDGImage(int mid){//根据编号得到图片路径
String result = null;
Connection con = getConnection();
PreparedStatement pstmt = null;
ResultSet rs = null;
try{
pstmt = con.prepareStatement("select image_dir from hjdg_image where mid=?");
pstmt.setInt(1, mid);
rs = pstmt.executeQuery();
while(rs.next()){
String b = rs.getString("image_dir");
result=b;
}
}

运行后页面的图片还是显示叉叉，请问是哪一步出问题呢？本人新手，望详细解答，谢谢！

Answer 1

做个请求，然后返回的是一个文件流，把src设置为这个流的请求即可展示