________JSP中文参数传至JavaBean出现乱码.docVIP

????????JSP中文参数传至JavaBean出现乱码 [关键字]:Tomcat,GBK,GB2312,Filter,乱码,JSP,charset,Servlet [摘要]:书上说的都能看懂，但是真正做起来却会遇到问题。解决这些问题的过程，就是上机练习的意义。以前遇到的乱码问题要么通过request.setCharacterEnconding(GB2312)解决了，要么就是new String(str.getBytes(ISO-8859-1) , GB2312)。但是这回是JavaBean出问题了。上面的两句行不通了，只能通过设置Filter来解决。希望遇到类似问题的朋友，站在我们的肩膀上，能看的更远。 ? [正文]: 写了一个简单的JavaBean,用于计算加减乘除。??? CalculateBean.java: ?? ?package ch6.calcbean;?? ?import java.io.*;?? ?public class CalculateBean{?? ??? ?private int operandFirst;//操作数1?? ??? ?private char operator;//运算符?? ??? ?private int operandSecond;//操作数2?? ??? ?private double result;//运算结果?? ??? ?public int getOperandFirst(){?? ??? ??? ?return this.operandFirst;?? ??? ?}?? ??? ?public void setOperandFirst(int op){?? ??? ??? ?this.operandFirst = op;?? ??? ?}?? ??? ?public char getOperator(){?? ??? ??? ?return operator;?? ??? ?}?? ??? ?public void setOperator(char operator){?? ??? ??? ?this.operator = operator;?? ??? ?}?? ??? ?public int getOperandSecond(){?? ??? ??? ?return this.operandSecond;?? ??? ?}?? ??? ?public void setOperandSecond(int op){?? ??? ??? ?this.operandSecond = op;?? ??? ?}?? ??? ?public double getResult(){?? ??? ??? ?return this.result;?? ??? ?}?? ??? ?public void setResult(double result){?? ??? ??? ?this.result = result;?? ??? ?}?? ??? ?public void calculate(){?? ??? ??? ?double temp;?? ??? ??? ?switch(operator){?? ??? ??? ??? ?case +:?? ??? ??? ??? ??? ?temp = getOperandFirst() + getOperandSecond();?? ??? ??? ??? ??? ?break;?? ??? ??? ??? ?case -:?? ??? ??? ??? ??? ?temp = getOperandFirst() - getOperandSecond();?? ??? ??? ??? ??? ?break;?? ??? ??? ??? ?case ×:?? ??? ??? ??? ??? ?temp = getOperandFirst() * getOperandSecond();?? ??? ??? ??? ??? ?break;?? ??? ??? ??? ?case ÷:?? ??? ??? ??? ??? ?temp = 1.0 * getOperandFirst() / getOperandSecond();?? ??? ??? ??? ??? ?break;?? ??? ??? ??? ?default:?? ??? ??? ??? ??? ?temp = 0;?? ??? ??? ?}?? ??? ??? ?setResult(temp);?? ??? ?}?? ?} ??? 由Calculate.j