自定义标签控制过长字符串的显示

问题描述：
关于自动换行问题,正常字符的换行是比较合理的,而连续的数字和英文字符常常将容器撑大,挺让人头疼。
我们可以通过CSS控制自动换行，但效果并不是很好，查了一些资料也没有找的好的现成的控件，于是我编写了一个自定义标签解决这个问题，可能其中还存在一些问题，也不是很完善，我会虚心听从指教。
关于自定义标签的理论可参看：JSP2的自定义标签这片贴子（引用的）。

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;

public class TagTextLimit extends BodyTagSupport{
    private int total = 0;

    private int numOfRow = 0;

    public int doEndTag()throws JspException{
        try{
            if(bodyContent!=null){
                String str = bodyContent.getString();
                String result = "";
                if( numOfRow!= 0){
                    String[] temp = str.split(" ");

                    for(int i = 0;i
                        if(temp[i].length() > numOfRow){
                                String str1 = temp[i].substring(0,numOfRow-1)+"-";
                                String str2 = temp[i].substring(numOfRow-1);

                                while(str2.length()>numOfRow-1){
                                    str1 += str2.substring(0,numOfRow-1)+"-";
                                    str2 = str2.substring(numOfRow-1);
                                }

                                temp[i] = str1.concat(str2);
                        }
                        result += temp[i]+" ";
                    }
                    str = result;
                }


                if(total!=0){
                    result = str.substring(0, total)+"...";
                }

                if(numOfRow == 0 && total == 0){
                    bodyContent.writeOut(bodyContent.getEnclosingWriter());
                }else{
                    pageContext.getOut().write(result);
                }

            }
        }catch(java.io.IOException ex){
            throw new JspTagException("IOError:"+ex.getMessage());
        }
        return EVAL_PAGE;
    }

    public int doStartTag() throws JspException {
        return EVAL_BODY_TAG;
    }

    public int doAfterBody() throws JspException {
        return SKIP_BODY;
    }

    public void doInitBody() throws JspException {
        super.doInitBody();
    }

    public void setBodyContent(BodyContent content) {
        this.bodyContent = content;
    }

    public int getNumOfRow() {
        return numOfRow;
    }

    public void setNumOfRow(int numOfRow) {
        this.numOfRow = numOfRow;
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }
}

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;

public class TagTextLimit extends BodyTagSupport{
    private int total = 0;
	
	private int numOfRow = 0;
	
	public int doEndTag()throws JspException{
		try{
			if(bodyContent!=null){
				String str = bodyContent.getString();
				String result = "";
				if( numOfRow!= 0){
					String[] temp = str.split(" ");
					
					for(int i = 0;i numOfRow){
								String str1 = temp[i].substring(0,numOfRow-1)+"-";
								String str2 = temp[i].substring(numOfRow-1);
								
								while(str2.length()>numOfRow-1){
									str1 += str2.substring(0,numOfRow-1)+"-";
									str2 = str2.substring(numOfRow-1);
								}
								
								temp[i] = str1.concat(str2);						
						}
						result += temp[i]+" "; 						
					}
					str = result;
				}
				
				
				if(total!=0){
					result = str.substring(0, total)+"...";
				}
				
				if(numOfRow == 0 && total == 0){
					bodyContent.writeOut(bodyContent.getEnclosingWriter());
				}else{
					pageContext.getOut().write(result);
				}
				
			}
		}catch(java.io.IOException ex){
			throw new JspTagException("IOError:"+ex.getMessage());
		}
		return EVAL_PAGE;
	}
	
	public int doStartTag() throws JspException {
		return EVAL_BODY_TAG;
	}

	public int doAfterBody() throws JspException {
		return SKIP_BODY;
	}

	public void doInitBody() throws JspException {
		super.doInitBody();
	}
	
	public void setBodyContent(BodyContent content) {
		this.bodyContent = content;
	}
	
	public int getNumOfRow() {
		return numOfRow;
	}

	public void setNumOfRow(int numOfRow) {
		this.numOfRow = numOfRow;
	}

	public int getTotal() {
		return total;
	}

	public void setTotal(int total) {
		this.total = total;
	}
}

 

 

• (12.9 KB)
• 描述: 自定义标签控制过长字符串的显示的例子（web项目）