我照着书编了一个java Bean的程序,不过怎么都不对!!希望大家多多指教!
有两个类
第一个类:
public class Employee {
String firstName,lastName,name;
String address,city,state,country;
int zip,salary,ssn;
public Employee(){}
public void setFirstName(String fn){firstName=fn;}
public String getFirstName(){return firstName;}
public void setLastName(String n){name=n;}
public String getLastName(){return lastName;}
public void setName(String n){name=n;}
public String getName(){return name;}
public void setAddress(String a){address=a;}
public String getAddress(){return address;}
public void setCity(String c){city=c;}
public String getCity(){return city;}
public void setState(String s){state=s;}
public String getState(){return state;}
public void setZip(int z){zip=z;}
public int getZip(){return zip;}
public void setCountry(String c){country=c;}
public String getCountry(){return country;}
public void setSalary(int s){salary=s;}
public int getSalary(){return salary;}
public void setSsn(int s){ssn=s;}
public int getSsn(){return ssn;}}
第二个类:
public class People {
String[] names={"Katen","Rafae","Alexandra","Cristina","Emlla","Victoria","Giuseppe","marco","Simona","Dente"};
public String getRandomName(){
int nameindex=(int)(names.length*Math.random());
return names[nameindex];
}
public int getRandomSSN(){
String randomSSN="0";
for(int j=0;j<8;j++)
randomSSN=randomSSN+((int)(9*Math.random()));
return Integer.parseInt(randomSSN);
}
public int getRandomInt(int maxint){
return(int)(maxint*Math.random());
}
}
jsp的界面是这样的
<html>
<title>A Random Payroll</title>
<body>
<jsp:useBean id="employee" class="Employee"/>
<jsp:useBean id="people" class="People"/>
<table width="100%">
<tr><td bgcolor="AAAAAA" align="center">Names</td>
<td bgcolor="AAAAAA" align="center">SSN</td>
<td bgcolor="AAAAAA" align="center">Salary</td>
</tr>
<% for(int j=0;j<10;j++){
employee.setFistName(people.getRandomName());
employee.setSsn(people.getRandomSSN());
employee.setSalary(people.getRandomInt(90)*1000);%>
<tr><td bgcolor="DDDDDD"><% =employee.getFirstName() %></td>
<td bgcolor="DDDDDD" align="right">
<% =employee.getSsn() %></td>
<td bgcolor="DDDDDD" align="right">
$<% =employee.getSalary() %></td>
</tr>
<% }%>
</table>
</body>
</html>
有两个类
第一个类:
public class Employee {
String firstName,lastName,name;
String address,city,state,country;
int zip,salary,ssn;
public Employee(){}
public void setFirstName(String fn){firstName=fn;}
public String getFirstName(){return firstName;}
public void setLastName(String n){name=n;}
public String getLastName(){return lastName;}
public void setName(String n){name=n;}
public String getName(){return name;}
public void setAddress(String a){address=a;}
public String getAddress(){return address;}
public void setCity(String c){city=c;}
public String getCity(){return city;}
public void setState(String s){state=s;}
public String getState(){return state;}
public void setZip(int z){zip=z;}
public int getZip(){return zip;}
public void setCountry(String c){country=c;}
public String getCountry(){return country;}
public void setSalary(int s){salary=s;}
public int getSalary(){return salary;}
public void setSsn(int s){ssn=s;}
public int getSsn(){return ssn;}}
第二个类:
public class People {
String[] names={"Katen","Rafae","Alexandra","Cristina","Emlla","Victoria","Giuseppe","marco","Simona","Dente"};
public String getRandomName(){
int nameindex=(int)(names.length*Math.random());
return names[nameindex];
}
public int getRandomSSN(){
String randomSSN="0";
for(int j=0;j<8;j++)
randomSSN=randomSSN+((int)(9*Math.random()));
return Integer.parseInt(randomSSN);
}
public int getRandomInt(int maxint){
return(int)(maxint*Math.random());
}
}
jsp的界面是这样的
<html>
<title>A Random Payroll</title>
<body>
<jsp:useBean id="employee" class="Employee"/>
<jsp:useBean id="people" class="People"/>
<table width="100%">
<tr><td bgcolor="AAAAAA" align="center">Names</td>
<td bgcolor="AAAAAA" align="center">SSN</td>
<td bgcolor="AAAAAA" align="center">Salary</td>
</tr>
<% for(int j=0;j<10;j++){
employee.setFistName(people.getRandomName());
employee.setSsn(people.getRandomSSN());
employee.setSalary(people.getRandomInt(90)*1000);%>
<tr><td bgcolor="DDDDDD"><% =employee.getFirstName() %></td>
<td bgcolor="DDDDDD" align="right">
<% =employee.getSsn() %></td>
<td bgcolor="DDDDDD" align="right">
$<% =employee.getSalary() %></td>
</tr>
<% }%>
</table>
</body>
</html>
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org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 16 in the jsp file: /randomPayroll.jsp
Generated servlet error:
D:\tomcat\work\Catalina\localhost\_\org\apache\jsp\randomPayroll_jsp.java:76: illegal start of expression
=employee.getFirstName()
^
An error occurred at line: 18 in the jsp file: /randomPayroll.jsp
Generated servlet error:
D:\tomcat\work\Catalina\localhost\_\org\apache\jsp\randomPayroll_jsp.java:80: illegal start of expression
=employee.getSsn()
^
An error occurred at line: 20 in the jsp file: /randomPayroll.jsp
Generated servlet error:
D:\tomcat\work\Catalina\localhost\_\org\apache\jsp\randomPayroll_jsp.java:84: illegal start of expression
=employee.getSalary()
^
3 errors
给你的BEAN 文件加上package b;
然后在JSP文件中import b.*;
<jsp:useBean id="employee" class="b.Employee" scope="page"/>
...接下来你自己调试把。。
1、employee.setFistName(people.getRandomName());
应该是setFirstName,少个r
2、<% =employee.getSsn() %>应是
<%= employee.getSsn() %>,空格位置有问题
<%= employee.getSsn() %>
空格位置有问题
应该等号两边都有空格!