一个新闻发布的BEAN,
里面有这两条语句
String file = "news\\ice"+titleMD5+".htm";
PrintWriter pw = new PrintWriter(new FileOutputStream(file));
是什么意思啊?有点迷惑。
news\\ice好像是个路径名,那么它在TOMCAT下应该放哪呢,是不是在BIN下,建一个news文件夹,然后再建立一个ice文件夹。
我编译这个 Bean时候出两个错如下:login\PubBean.java:28: unclosed string literal
db.Update("insert into news values('"+title+"','"+titleMD5+"'));
^
login\PubBean.java:29: ')' expected
String file = "news\\ice"+titleMD5+".htm";bean 如下, md5是一个算法类,db是个链接数据库的类,都已经编译成功。
public PubBean() {
db = new DB();
md5 = new MD5();
}
public void setTitle(String title){
this.title = title;
}
public void setContext(String context) {
this.context = context;
}
public void pubIt() {
try {
title = new String(title.getBytes("8859_1"),"gb2312");
context = new String(context.getBytes("8859_1"),"gb2312");
String titleMD5 = md5.getkeyBeanofStr(title);
db.Update("insert into news values('"+title+"','"+titleMD5+"'));
String file = "news\\ice"+titleMD5+".htm";
PrintWriter pw = new PrintWriter(new FileOutputStream(file));
pw.println("<title>"+title+"</title>");
pw.println(context);
pw.close();
}
catch(Exception e){
System.out.println(e);
}
}
}
里面有这两条语句
String file = "news\\ice"+titleMD5+".htm";
PrintWriter pw = new PrintWriter(new FileOutputStream(file));
是什么意思啊?有点迷惑。
news\\ice好像是个路径名,那么它在TOMCAT下应该放哪呢,是不是在BIN下,建一个news文件夹,然后再建立一个ice文件夹。
我编译这个 Bean时候出两个错如下:login\PubBean.java:28: unclosed string literal
db.Update("insert into news values('"+title+"','"+titleMD5+"'));
^
login\PubBean.java:29: ')' expected
String file = "news\\ice"+titleMD5+".htm";bean 如下, md5是一个算法类,db是个链接数据库的类,都已经编译成功。
public PubBean() {
db = new DB();
md5 = new MD5();
}
public void setTitle(String title){
this.title = title;
}
public void setContext(String context) {
this.context = context;
}
public void pubIt() {
try {
title = new String(title.getBytes("8859_1"),"gb2312");
context = new String(context.getBytes("8859_1"),"gb2312");
String titleMD5 = md5.getkeyBeanofStr(title);
db.Update("insert into news values('"+title+"','"+titleMD5+"'));
String file = "news\\ice"+titleMD5+".htm";
PrintWriter pw = new PrintWriter(new FileOutputStream(file));
pw.println("<title>"+title+"</title>");
pw.println(context);
pw.close();
}
catch(Exception e){
System.out.println(e);
}
}
}
如果也是字符串的话,String file = "news\\ice"+titleMD5+".htm";
PrintWriter pw = new PrintWriter(new FileOutputStream(file));
的作用就是在当前目录下传创建一个news\ice+titleMD5.html这种目录结构的文件,同时用这个文件创建一个文件输出流,并封装成PrintWriter!db.Update("insert into news values('"+title+"','"+titleMD5+"'));改成
db.Update("insert into news values('"+title+"','"+titleMD5+"')");后面少了个引号
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: -1 in the jsp file: nullGenerated servlet error:
[javac] Compiling 1 source fileC:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\pub_jsp.java:29: 'try' without 'catch' or 'finally'
try {
^
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\pub_jsp.java:70: illegal start of type
} catch (Throwable t) {
^
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\pub_jsp.java:80: expected
}
^
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\pub_jsp.java:81: 'class' or 'interface' expected
}
^
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\pub_jsp.java:82: 'class' or 'interface' expected
^
5 errors
pub.jsp文件代码如下:
<%@ page contentType="text/html;charset=gb2312"%>
<%
String title = request.getParameter("title");
String context = request.getParameter("context");
%>
<jsp:useBean id="pubBean" class="login.PubBean"/>
<jsp:setProperty name="pubBean" property="title" value="<%= title.trim() %>"/>
<jsp:setProperty name="pubBean" property="context" value="<%= context %>"/>
<%
pubBean.pubIt();
response.sendRedirect("display.jsp");
}
%>why?
pubBean.pubIt();
response.sendRedirect("display.jsp");
} -----这里多了一个"}"
%>
有可能发生异常,你并没有加try..catch拦截它
news\\ice好像是个路径名,那么它在TOMCAT下应该放哪呢,是不是在BIN下,建一个news文件夹,然后再建立一个ice文件夹。JVM在创建这个String时会在你的当前目录下会找news目录,可以通过user.dir来得知当前目录的绝对位置,如果没有这个news目录,也许会下面处理按照这个path来处理file时就会出错,所以要保证当前目录下存在这样的目录结构,及相关文件,如:..\news\ice\tilemd5.html
2.db.Update("insert into news values('"+title+"','"+titleMD5+"'));
少了个引号:db.Update("insert into news values('"+title+"','"+titleMD5+"')");
3.你的Bean有问题,如try...catch...检查程序
那段代码没运行?