关于把<转化成&lt;的问题帮我看一下代码！！帮帮

Question

String.replace是字符代替字符不是字符串。仔细看文档。

Answer 1

用replaceAll()可以替换字符串
不过要jdk1.4哦

Answer 2

//禁用HTML代码编码
public String html(String s){
String re;
re=replace(s,"<","&lt;");
    re=replace(re,">","&gt;");
    re=replace(re,"\n","<br>");
    re=replace(re," ","&nbsp;");
    re=replace(re,"'","&#39");
    return re;
}

Answer 3

package walksing.string;
import java.text.*;
import java.util.*; 
public class wsString
{ /***$id added by WalkSing [[email protected]] 2003-03-22 9:57 ***/
public String Jreplace(String S,String T,String I)
 {  /*$id:walksing [email protected] 2002-03-12 9:57 make.
   *para S --Source String will  find to be replaced String,which will be overwrite with T;
*para T --Target String which will overwrite S;
*para I --Input String from which to find;
*return String replacement Result;
*note:S,T,I can be String Type;
*ver 1.0;
*/
  if (I.length()<=0 || S.length()<=0 ) return I; 
  int ic=0;
String b1="";
char ch;
StringBuffer b = new StringBuffer(I.length()+6);
for (int i=0;i<I.length();i++)
{
ch=I.charAt(i);

if (ch==S.charAt(ic))//find one char of S
{
b1+=ch;//store to b1;
++ic;
if (ic==S.length())//find one String S from String I
{
b1="";
ic=0;
b.append(T);//replace this S with T
} 

}
else
{
if (ic==0) //not find 
{
b.append(ch);

}
else if(ic!=0)
{// not equal all String S
b1+=ch;
b.append(b1.toString());//store b1;
ic=0; //set  b.length=0
b1="";//set b1= null and to store another
}
}
}
return b.toString();
 }public String[] split(String pattern ,String string) 
{
/*@$ID 2002-03-25 9:38 China
*@para String pattern ,by rule to split the string
*@para String string ,which to be split from string
*example:
String str="server/$/user/$/password";
    String[] str2=bbs.split("/$/",str);
then str2[0]="server",str2[1]="user",str2[2]="password";
*AUTHOR:WalkSing [[email protected]]
*VER:1.0
*/
String[] result= {};
char ch;
int ic=0;
int arrCount=0;
String element="";
String strBak="";
StringBuffer usage=new StringBuffer();
usage.append("/*$ID 2002-03-25 9:38 China\n");
usage.append("*@para String pattern ,by rule to split the string\n");
usage.append("*@para String string ,which to be split from string\n");
usage.append("*example:\n");
usage.append("String str=\"server/$/user/$/password\n\";");
    usage.append("String[] str2=bbs.split(\"/$/\",str);\n");
usage.append("then str2[0]=\"server\",str2[1]=\"user\",str2[2]=\"password\";\n");
usage.append("*AUTHOR:WalkSing [[email protected] [email protected]]\n");
usage.append("*VER:1.0\n");
if (string.equals(""))
{
System.out.println(usage.toString());
result[0]= usage.toString();
return result;
}
for (int i=0;i<string.length();i++)//FIND ARRCOUNT
{
ch=string.charAt(i);
if (ch==pattern.charAt(ic)) 
{
ic++;//find next pattern ch
//strBak+=ch;
if (ic==pattern.length())//find one arrary element
{
arrCount++;
ic=0;  //resset ic
//strBak=""; //reset strBak
}
}
}
result=new String[arrCount+1];//STORE TO STRING[] ARRAY
ic=0;
arrCount=0;
for (int i=0;i<string.length();i++)//FIND ARRCOUNT
{
ch=string.charAt(i);
if (ch==pattern.charAt(ic)) 
{
ic++;//find next pattern ch
strBak+=ch;
if (ic==pattern.length())//find one arrary element
{
result[arrCount]=element;//store element to array
arrCount++;
ic=0;  //resset ic
strBak=""; //reset strBak
element="";//reset element to store next
}
continue;
}
if (ic!=0)
{
element+=strBak;
ic=0;
strBak="";
}
element +=ch;
}
if ((!element.equals(""))||(!strBak.equals("")))
{
element+=strBak;
result[arrCount]=element.toString();
strBak =null;
element=null;
}
if (result[arrCount]==(null))
result[arrCount]="";
return result;
}public String getStr(String str)
    {
   try
{
String temp_p=str;
byte[] temp_t=temp_p.getBytes("ISO8859-1");
String temp  =new String(temp_t);
return temp;
}
catch(Exception e)
{
return null;
}
    } 
public String getHtmlFormat(String exp1)
{                                                                       
                 
  String exp2="",dealinput="";
  if (exp1==null||exp1.equals(""))
   return dealinput;                                                                                          
  exp2=Jreplace("<","&lt;",exp1);                                                                                                
  exp2=Jreplace(">","&gt;",exp2);    
  exp2=Jreplace(" ","&nbsp;",exp2);
  exp2=Jreplace("'","''",exp2);
  exp2=Jreplace("\n","<br>",exp2); 
  exp2=Jreplace("&lt;br&gt;","<br>",exp2);
  exp2=AutoWrap(exp2, exp2.length());                                                       
  dealinput=exp2;                                                                                           
  return dealinput;                                                                                                
} 
public String dealinput(String exp1)
{                                                                                                  
  String exp2="",dealinput="";
  if (exp1==null||exp1.equals(""))
   return dealinput;                                                                                          
  exp2=Jreplace("<","&lt;",exp1);                                                                                                
  exp2=Jreplace(">","&gt;",exp2);    
  exp2=Jreplace(" ","&nbsp;",exp2);
  exp2=Jreplace("'","''",exp2);
  exp2=Jreplace("\n","<br>",exp2); 
  exp2=Jreplace("&lt;br&gt;","<br>",exp2);  
  exp2=AutoWrap(exp2, exp2.length());                                                       
  dealinput=exp2;                                                                                           
  return dealinput;                                                                                                
} 
}//end class
///*************************************************************************//

Answer 4

package walksing.string;
import java.text.*;
import java.util.*; 
public class wsString
{ /***$id added by WalkSing [[email protected]] 2003-03-22 9:57 ***/
public String Jreplace(String S,String T,String I)
 {  /*$id:walksing [email protected] 2002-03-12 9:57 make.
   *para S --Source String will  find to be replaced String,which will be overwrite with T;
*para T --Target String which will overwrite S;
*para I --Input String from which to find;
*return String replacement Result;
*note:S,T,I can be String Type;
*ver 1.0;
*/
  if (I.length()<=0 || S.length()<=0 ) return I; 
  int ic=0;
String b1="";
char ch;
StringBuffer b = new StringBuffer(I.length()+6);
for (int i=0;i<I.length();i++)
{
ch=I.charAt(i);

if (ch==S.charAt(ic))//find one char of S
{
b1+=ch;//store to b1;
++ic;
if (ic==S.length())//find one String S from String I
{
b1="";
ic=0;
b.append(T);//replace this S with T
} 

}
else
{
if (ic==0) //not find 
{
b.append(ch);

}
else if(ic!=0)
{// not equal all String S
b1+=ch;
b.append(b1.toString());//store b1;
ic=0; //set  b.length=0
b1="";//set b1= null and to store another
}
}
}
return b.toString();
 }public String[] split(String pattern ,String string) 
{
/*@$ID 2002-03-25 9:38 China
*@para String pattern ,by rule to split the string
*@para String string ,which to be split from string
*example:
String str="server/$/user/$/password";
    String[] str2=bbs.split("/$/",str);
then str2[0]="server",str2[1]="user",str2[2]="password";
*AUTHOR:WalkSing [[email protected]]
*VER:1.0
*/
String[] result= {};
char ch;
int ic=0;
int arrCount=0;
String element="";
String strBak="";
StringBuffer usage=new StringBuffer();
usage.append("/*$ID 2002-03-25 9:38 China\n");
usage.append("*@para String pattern ,by rule to split the string\n");
usage.append("*@para String string ,which to be split from string\n");
usage.append("*example:\n");
usage.append("String str=\"server/$/user/$/password\n\";");
    usage.append("String[] str2=bbs.split(\"/$/\",str);\n");
usage.append("then str2[0]=\"server\",str2[1]=\"user\",str2[2]=\"password\";\n");
usage.append("*AUTHOR:WalkSing [[email protected] [email protected]]\n");
usage.append("*VER:1.0\n");
if (string.equals(""))
{
System.out.println(usage.toString());
result[0]= usage.toString();
return result;
}
for (int i=0;i<string.length();i++)//FIND ARRCOUNT
{
ch=string.charAt(i);
if (ch==pattern.charAt(ic)) 
{
ic++;//find next pattern ch
//strBak+=ch;
if (ic==pattern.length())//find one arrary element
{
arrCount++;
ic=0;  //resset ic
//strBak=""; //reset strBak
}
}
}
result=new String[arrCount+1];//STORE TO STRING[] ARRAY
ic=0;
arrCount=0;
for (int i=0;i<string.length();i++)//FIND ARRCOUNT
{
ch=string.charAt(i);
if (ch==pattern.charAt(ic)) 
{
ic++;//find next pattern ch
strBak+=ch;
if (ic==pattern.length())//find one arrary element
{
result[arrCount]=element;//store element to array
arrCount++;
ic=0;  //resset ic
strBak=""; //reset strBak
element="";//reset element to store next
}
continue;
}
if (ic!=0)
{
element+=strBak;
ic=0;
strBak="";
}
element +=ch;
}
if ((!element.equals(""))||(!strBak.equals("")))
{
element+=strBak;
result[arrCount]=element.toString();
strBak =null;
element=null;
}
if (result[arrCount]==(null))
result[arrCount]="";
return result;
}public String getStr(String str)
    {
   try
{
String temp_p=str;
byte[] temp_t=temp_p.getBytes("ISO8859-1");
String temp  =new String(temp_t);
return temp;
}
catch(Exception e)
{
return null;
}
    } 
public String getHtmlFormat(String exp1)
{                                                                       
                 
  String exp2="",dealinput="";
  if (exp1==null||exp1.equals(""))
   return dealinput;                                                                                          
  exp2=Jreplace("<","&lt;",exp1);                                                                                                
  exp2=Jreplace(">","&gt;",exp2);    
  exp2=Jreplace(" ","&nbsp;",exp2);
  exp2=Jreplace("'","''",exp2);
  exp2=Jreplace("\n","<br>",exp2); 
  exp2=Jreplace("&lt;br&gt;","<br>",exp2);
  exp2=AutoWrap(exp2, exp2.length());                                                       
  dealinput=exp2;                                                                                           
  return dealinput;                                                                                                
} 
public String dealinput(String exp1)
{                                                                                                  
  String exp2="",dealinput="";
  if (exp1==null||exp1.equals(""))
   return dealinput;                                                                                          
  exp2=Jreplace("<","&lt;",exp1);                                                                                                
  exp2=Jreplace(">","&gt;",exp2);    
  exp2=Jreplace(" ","&nbsp;",exp2);
  exp2=Jreplace("'","''",exp2);
  exp2=Jreplace("\n","<br>",exp2); 
  exp2=Jreplace("&lt;br&gt;","<br>",exp2);  
  exp2=AutoWrap(exp2, exp2.length());                                                       
  dealinput=exp2;                                                                                           
  return dealinput;                                                                                                
} 
}//end class
///*************************************************************************//

Answer 5

不好意思，我真是看不懂WalkSing(我行) 的代码
zijianyi(紫剑伊) 我按你的写了一下，但编译时出现错误
package str;
import java.text.*;
import java.util.*; 
import java.lang.*;
public class str
{
public String str(String s)
{
String re;
re=replace(s,"<","&lt;");
    re=replace(re,">","&gt;");
    return re;
}
}
这是怎么回事呢？