在JavaScript程序中整合Java函数

来源：yesky 作者：wayne 出处：巧巧读书 2005-11-22 进入讨论组

public void doPost(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
throws ServletException, IOException
{
doGet(httpservletrequest, httpservletresponse);
}

public void doGet(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
throws ServletException, IOException
{
String s = "";
String s1 = "";
s = HttpUtils.getRequestURL(httpservletrequest).toString();
file://返回一个字符串，包含请求字符串中包含的协议名，主机名，端口号以及路径，但是不包含请求的内容
int i;
if((i = s.indexOf("?")) ＞ 0)//去掉s结尾的问号
s = s.substring(0, i);
s1 = httpservletrequest.getQueryString();//取的请求字符串的请求内容
if(s1 == null)
{
parseFile(s1, httpservletrequest, httpservletresponse);
return;
}
if(s1.equals(admin)) file://如果请求串等于admin
{
adminPage(httpservletrequest, httpservletresponse, s); file://进入管理员界面
return;
}
if(s1.equals("namiotde")) file://如果请求串为namiotde，则执行相应的执行命令
{
executeRequest(httpservletrequest, httpservletresponse);
return;
}
String s2 = getFromQuery(s1, "what="); file://取的动作的属性值
if(s2.equals("hframe"))
{
getHiddenFrame(httpservletrequest, httpservletresponse);//转到隐藏帧
return;
}
if(s2.equals("mframe"))
{
getMainFrame(s1, httpservletrequest, httpservletresponse); file://转到主帧
return;
}
else
{
parseFile(s1, httpservletrequest, httpservletresponse);
return;
}
}
file://管理员界面，执行添加删除对象的操作
private void adminPage(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s)
throws IOException
{
PrintWriter printwriter = httpservletresponse.getWriter();
String s1 = "";
String s4 = httpservletrequest.getParameter("what"); file://返回请求串中what，即动作的属性值
if(s4 != null)
if(s4.equals("delete")) file://如果what的值为delete，则执行相应的操作
{
for(Enumeration enumeration = httpservletrequest.getParameterNames(); enumeration.hasMoreElements();)
{
String s2 = (String)enumeration.nextElement();
if(s2.startsWith("_"))
{
inst.remove(s2.substring(1));
s1 = s1 + " " + s2.substring(1);
}
}

if(s1.length() ＞ 0)
s1 = "删除: " + s1;
}
else
if(s4.equals("add")) file://如果what的值为add，则执行相应的操作
{
String s5 = httpservletrequest.getParameter("oname");//取的对象名
String s6 = httpservletrequest.getParameter("JinJ"); file://取得类名
String s7 = httpservletrequest.getParameter("params"); file://取得参数
if(s5 == null)
s5 = "";
else
s5 = s5.trim();
if(s6 == null)
s6 = "";
else
s6 = s6.trim();
if(s7 == null)
s7 = "";
else
s7 = s7.trim();
if(s7.length() ＞ 0 && !s7.startsWith("("))
s7 = "(" + s7 + ")";
if(s5.length() ＞ 0 && s6.length() ＞ 0 && inst.size() ＜ 5)
{
String s3 = s5 + "=new " + s6 + s7;//写成标准的对象实例化形式
if(processLine1(s5, s6, s7, s3))
s1 = s5 + " 被载入...";
else
s1 = "不能载入" + s3;
}
}
httpservletresponse.setContentType("text/html");
printwriter.println("＜html＞");
printwriter.println("＜head＞");
printwriter.println("＜title＞JinJ 控制台＜/title＞");
printwriter.println("＜/head＞");
printwriter.println("＜body bgcolor=\"#FFFFFF\"＞");
printwriter.println(setScript());
if(s1.length() ＞ 0)
printwriter.println("＜br＞＜i＞" + s1 + "＜/i＞＜br＞");
printwriter.println("＜h2＞＜center＞对象＜/center＞＜/h2＞");
printwriter.println("＜br＞");
printwriter.println(objectsTable(s));
printwriter.println("＜/body＞");
printwriter.println("＜/html＞");
}

private String setScript()
{
StringBuffer stringbuffer = new StringBuffer();
stringbuffer.append("＜script language=\"JavaScript\"＞" + NEWLINE);
stringbuffer.append("function fun(what)" + NEWLINE);
stringbuffer.append("{ document.mf.what.value=what; document.mf.submit(); }" + NEWLINE);
stringbuffer.append("＜/script＞" + NEWLINE);
return stringbuffer.toString();
}

private String objectsTable(String s)
{
StringBuffer stringbuffer = new StringBuffer();
String s2 = "#D5E6E1";
stringbuffer.append("＜form name=\"mf\" method=post action=\"" + s + "?" + admin + "\"＞" + NEWLINE);
stringbuffer.append("＜input type=hidden name=\"what\"＞" + NEWLINE);
stringbuffer.append("＜table width=98% border=0＞");
stringbuffer.append("＜tr bgcolor=#CCCCFF＞＜td nowrap＞＜/td＞＜td nowrap＞对象名＜/td＞＜td nowrap＞类名＜/td＞＜/tr＞" + NEWLINE);
for(Enumeration enumeration = inst.keys(); enumeration.hasMoreElements();)
{
String s1 = (String)enumeration.nextElement();
Object aobj[] = (Object[])inst.get(s1);
stringbuffer.append("＜tr bgcolor=\"" + s2 + "\"＞");
stringbuffer.append("＜td width=5 nowrap＞");
stringbuffer.append("＜input type=checkbox name=\"_" + s1 + "\"＞");
stringbuffer.append("＜/td＞");
stringbuffer.append("＜td nowrap＞" + s1 + "＜/td＞＜td nowrap＞" + aobj[0] + "＜/td＞＜/tr＞" + NEWLINE);
if(s2.equals("#D5E6E1"))
s2 = "#F7F7F7";
else
s2 = "#D5E6E1";
}

stringbuffer.append("＜/table＞" + NEWLINE);
stringbuffer.append("＜br＞＜br＞");
stringbuffer.append("＜table＞" + NEWLINE);
stringbuffer.append("＜tr＞");
if(inst.size() ＞ 0)
stringbuffer.append("＜td align=left nowrap＞＜input type=button value=Delete onClick=\"fun('delete');\"＞＜/td＞");
else
stringbuffer.append("＜td nowrap＞＜/td＞");
stringbuffer.append("＜td nowrap＞＜/td＞");
stringbuffer.append("＜td align=right nowrap＞对象名＜input type=text size=10 name=\"oname\"＞类名＜input type=text size=18 name=\"JinJ\"＞参数＜input type=text name=\"params\"＞ ");
stringbuffer.append("＜input type=button value=Add onClick=\"fun('add');\"＞＜/td＞＜/tr＞");
stringbuffer.append("＜/table＞" + NEWLINE);
stringbuffer.append("＜/form＞");
return stringbuffer.toString();
}
file://分析文件
private void parseFile(String s, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
throws IOException
{
String s1 = getUrl(httpservletrequest);
String s2 = getFile(s, httpservletrequest);
httpservletresponse.setContentType("text/html");
PrintWriter printwriter = httpservletresponse.getWriter();
printwriter.println("＜html＞");
if(s1 == null)
{
printwriter.println("＜br＞找不到servlet名.请检查初始参数");
}
else
{
printwriter.println("＜frameset rows=\"*,100%\" border=0＞");
printwriter.println("＜frame name=\"hframe\" src=\"" + s1 + "?" + "what" + "=" + "hframe" + "\"＞");
printwriter.println("＜frame name=\"mframe\" src=\"" + s1 + "?" + "what" + "=" + "mframe" + "&" + "df" + "=" + s2 + "\"＞");
printwriter.println("＜/frameset＞");
}
printwriter.println("＜/html＞");
printwriter.flush();
printwriter.close();
}