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分享这样声明对吗？？在线等！
在jsp中这样声明：
<%!
public class OutputPicture{
private InputStream in;
public OutputPicture(){
}
public setMyInputStream(InputStream in){
this.in=in;
}
public void outputPhoto(){
byte[] b = new byte[1024*1024];
int len;
OutputStream out1;
while((len=in.read(b))>0)
out1.write(b,0,len);
out1.flush();
in.close();
}
}
%>
调用： OutputPicture putpicture=new OutputPicture();
putpicture.setMyInputStream(in); <center><imgsrc=putpicture.outputPhoto() width="5" height="6"></center>
总是有错误：invalid method declaration; return type required
public setMyInputStream(InputStream in){
怎么办？请帮忙！
<%!
public class OutputPicture{
private InputStream in;
public OutputPicture(){
}
public setMyInputStream(InputStream in){
this.in=in;
}
public void outputPhoto(){
byte[] b = new byte[1024*1024];
int len;
OutputStream out1;
while((len=in.read(b))>0)
out1.write(b,0,len);
out1.flush();
in.close();
}
}
%>
调用： OutputPicture putpicture=new OutputPicture();
putpicture.setMyInputStream(in); <center><imgsrc=putpicture.outputPhoto() width="5" height="6"></center>
总是有错误：invalid method declaration; return type required
public setMyInputStream(InputStream in){
怎么办？请帮忙！
...全文
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ljliang 2003-04-09
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OutputStream out1=new OutputStream();//// 这行如何改？？？
ljliang 2003-04-09
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大家看我的程序，我用什么来初始化呀？我真是不清楚！<%!
public class OutputPicture{
private InputStream in;
public OutputPicture(){
}
public void setMyInputStream(InputStream in){
this.in=in;
}
public void outputPhoto(){
byte[] b = new byte[1024*1024];
int len;
OutputStream out1=new OutputStream();
try{
while((len=in.read(b))>0)
out1.write(b,0,len);
out1.flush();
in.close();
}catch(IOException e){
System.out.println(e.getMessage());
}
}
}
%>
public class OutputPicture{
private InputStream in;
public OutputPicture(){
}
public void setMyInputStream(InputStream in){
this.in=in;
}
public void outputPhoto(){
byte[] b = new byte[1024*1024];
int len;
OutputStream out1=new OutputStream();
try{
while((len=in.read(b))>0)
out1.write(b,0,len);
out1.flush();
in.close();
}catch(IOException e){
System.out.println(e.getMessage());
}
}
}
%>
whodsow 2003-04-09
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OutputStream outl=new OutputStream(...);
就完成初始化了。
就完成初始化了。
lljjsp 2003-04-09
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我也有同样的问题，就是OutputStream out1未初始化，不知如何初始化？我也不知道，谁知道？
gaojunbo 2003-04-09
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out1.write(b,0,len);
这一句要放在
try
{}
catch()
{}
中
这一句要放在
try
{}
catch()
{}
中
ljliang 2003-04-09
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up
gaojunbo 2003-04-09
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OutputStream out1;
是一个局部变量,在便用前必须先初始张才行.
是一个局部变量,在便用前必须先初始张才行.
ljliang 2003-04-09
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各位说得很对。但是，现在又有新错误：
45: unreported exception java.io.IOException; must be caught or declared to be thrown
46: variable out1 might not have been initialized
46: unreported exception java.io.IOException; must be caught or declared to be thrown
请各位在看看！谢谢！
45: unreported exception java.io.IOException; must be caught or declared to be thrown
46: variable out1 might not have been initialized
46: unreported exception java.io.IOException; must be caught or declared to be thrown
请各位在看看！谢谢！
moumouren 2003-04-09
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/* 除了构造方法，其他的都必须声明返回值 */
public void setMyInputStream(InputStream in){
this.in=in;
}
public void setMyInputStream(InputStream in){
this.in=in;
}
zez 2003-04-09
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楼上说了 :)
gaojunbo 2003-04-09
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public setMyInputStream(InputStream in)
{
his.in=in;
}
此方法没有写返回值的类型,如无返回值要写上void,
public void setMyInputStream(InputStream in){
this.in=in;
}
{
his.in=in;
}
此方法没有写返回值的类型,如无返回值要写上void,
public void setMyInputStream(InputStream in){
this.in=in;
}
