js 怎么把blob类型转化为string

Answer 1

1、在类中定义大字段：
Java代码
public class informAffiche {
private Blob content;

public void setcontent(Blob S_content)
{
content=S_content;
}
public Blob getcontent()
{
return content;
}

}

2、数据库中读取大字段内容并set进去：
Java代码
while(rs.next())
{
s.setcontent(rs.getBlob("content"));
}

3、在页面得到

Java代码
if (list.size()>0){
s=(informAffiche)list.get(0);
Blob blob= s.getcontent();

if(blob == null || blob.length()==0){
content = "";
}else{
content = new String(blob.getBytes((long)1, (int)blob.length()));
System.out.println("content---->"+content);
}

}

4、页面输出：
<td><%=content %></td>

Answer 2

function decodeUtf8(bytes) {

var encoded = "";

for (var i = 0; i < bytes.length; i++) {

encoded += '%' + bytes[i].toString(16);

}

return decodeURIComponent(encoded);

}