使用请求包装器RequestWrapper 对博客内容进行编码

1.写一个文章类

代码如下

package model;

public class article {
	private int id;
	private  String title;
	private  String content;
	
	public article() {
		super();
		// TODO 自动生成的构造函数存根
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getContent() {
		return content;
	}

	public void setContent(String content) {
		this.content = content;
	}

}

　2.写一个数据库操作类

package dao;

import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

import model.article;

public class Addarticle {

	public Addarticle(article article) {
		String url ="jdbc:mysql://149.129.88.241:3306/A?useUnicode=true&characterEncoding=utf-8";
		String user="A";
		String password="888888";
		
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
		
		try {
			Connection connection = DriverManager.getConnection(url,user,password);
			String sql = "insert into article (title,content) values (?,?)";
			PreparedStatement statement = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);//预处理sql语句
			statement.setString(1,article.getTitle());//设置文件名
			statement.setString(2,article.getContent());//设置输入流
			
			statement.executeUpdate();//处理sql语句
			
			statement.close();
		} catch (SQLException e) {
			// TODO 自动生成的 catch 块
			e.printStackTrace();
		}
	}
	
}

3.写一个servlet

关键代码如下

		String title=request.getParameter("title");
		String content=request.getParameter("content");
		
		article article = new article();
		article.setTitle(title);
		article.setContent(content);
		
		Addarticle a= new Addarticle(article);

4.把EscapeFilter.java,和EscapeRequestWrapper.java复制到src的包里面,提交文章后的HTML标签会被编码

如图所示