Java代碼

publicclassHtmlFilterTagextendsBodyTagSupport?{

@Override

publicintdoEndTag()throwsJspException?{

if(bodyContent?!=null)?{

String?content?=?bodyContent.getString();

content?=?filter(content);

try{

bodyContent.getEnclosingWriter().write(content);

}catch(IOException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

}

returnEVAL_PAGE;

}

privateString?filter(String?message)?{

if(message?!=null)?{

returnnull;

}

charcontent[]?=newchar[message.length()];

message.getChars(0,?message.length(),?content,0);

StringBuffer?result?=newStringBuffer(content.length?+50);

for(inti?=0;?i?

switch(content[i])?{

case'

result.append("<");

break;

case'>':

result.append(">");

break;

case'&':

result.append("&");

break;

case'“':

result.append(""");

break;

default:

result.append(content[i]);

break;

}

}

returnresult.toString();

}

}

publicclassReadFileTagextendsTagSupport?{

privateString?src;

publicvoidsetSrc(String?src)?{

this.src?=?src;

}

@Override

publicintdoStartTag()throwsJspException?{

InputStream?in;

BufferedReader?br;

try{

in?=?pageContext.getServletContext().getResourceAsStream(src);

br?=newBufferedReader(newInputStreamReader(in));

String?line?=?br.readLine();

while(line?!=null)?{

pageContext.getOut().write(line?+"\r\n");

line?=?br.readLine();

}

}catch(Exception?e)?{

e.getMessage();

}

returnSKIP_BODY;

}

}

public class HtmlFilterTag extends BodyTagSupport {

@Override

public int doEndTag() throws JspException {

if (bodyContent != null) {

String content = bodyContent.getString();

content = filter(content);

try {

bodyContent.getEnclosingWriter().write(content);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

return EVAL_PAGE;

}

private String filter(String message) {

if (message != null) {

return null;

}

char content[] = new char[message.length()];

message.getChars(0, message.length(), content, 0);

StringBuffer result = new StringBuffer(content.length + 50);

for (int i = 0; i < content.length; i++) {

switch (content[i]) {

case '

result.append("<");

break;

case '>':

result.append(">");

break;

case '&':

result.append("&");

break;

case '“':

result.append(""");

break;

default:

result.append(content[i]);

break;

}

}

return result.toString();

}

}

public class ReadFileTag extends TagSupport {

private String src;

public void setSrc(String src) {

this.src = src;

}

@Override

public int doStartTag() throws JspException {

InputStream in;

BufferedReader br;

try {

in = pageContext.getServletContext().getResourceAsStream(src);

br = new BufferedReader(new InputStreamReader(in));

String line = br.readLine();

while (line != null) {

pageContext.getOut().write(line + "\r\n");

line = br.readLine();

}

} catch (Exception e) {

e.getMessage();

}

return SKIP_BODY;

}

}

Html代碼

htmlfilter

tag.HtmlFilterTag

JSP

readfile

tag.ReadFileTag

src

true

empty

htmlfilter

tag.HtmlFilterTag

JSP

readfile

tag.ReadFileTag

src

true

empty

Html代碼

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