过滤字符串中的危险字符

StringUtil7.java

public class StringUtil7 {
    private String sourceStr;//源字符串
    private String targetStr;//替换后的字符串
    public String getSourceStr() {
        return sourceStr;
    }
    public void setSourceStr(String sourceStr) {
        this.sourceStr = sourceStr;
    }
    public String getTargetStr() {
        sourceStr=sourceStr.replaceAll("&", "&");
        sourceStr=sourceStr.replaceAll(";", "");
        sourceStr=sourceStr.replaceAll("<", "<");
        sourceStr=sourceStr.replaceAll(">", ">");
        sourceStr=sourceStr.replaceAll("%", "");
        sourceStr=sourceStr.replaceAll("=", "");
        targetStr=sourceStr;
        return targetStr;
    }
    public void setTargetStr(String targetStr) {
        this.targetStr = targetStr;
    }
    
}

index.jsp

    

        

            

                
请输入字符串：
                

            
            

                

            
        
    

result.jsp

    <%
        request.setCharacterEncoding("utf-8");
        String sourceStr= request.getParameter("sourceStr");
    %>
    
    
    

        

            
过滤之前的字符串：
            

                
            
        
        

            
过滤之后的字符串：
            

                
            
        
    

17.PNG

20.PNG

19.PNG