SpringMvc常见配置

自定义乱码过滤器

package com.zhang.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;

/**
* 解决get和post请求 全部乱码的过滤器
*/
public class GenericEncodingFilter implements Filter {

   @Override
   public void destroy() {
  }

   @Override
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
       //处理response的字符编码
       HttpServletResponse myResponse=(HttpServletResponse) response;
       myResponse.setContentType("text/html;charset=UTF-8");

       // 转型为与协议相关对象
       HttpServletRequest httpServletRequest = (HttpServletRequest) request;
       // 对request包装增强
       HttpServletRequest myrequest = new MyRequest(httpServletRequest);
       chain.doFilter(myrequest, response);
  }

   @Override
   public void init(FilterConfig filterConfig) throws ServletException {
  }

}

//自定义request对象，HttpServletRequest的包装类
class MyRequest extends HttpServletRequestWrapper {

   private HttpServletRequest request;
   //是否编码的标记
   private boolean hasEncode;
   //定义一个可以传入HttpServletRequest对象的构造函数，以便对其进行装饰
   public MyRequest(HttpServletRequest request) {
       super(request);// super必须写
       this.request = request;
  }

   // 对需要增强方法 进行覆盖
   @Override
   public Map getParameterMap() {
       // 先获得请求方式
       String method = request.getMethod();
       if (method.equalsIgnoreCase("post")) {
           // post请求
           try {
               // 处理post乱码
               request.setCharacterEncoding("utf-8");
               return request.getParameterMap();
          } catch (UnsupportedEncodingException e) {
               e.printStackTrace();
          }
      } else if (method.equalsIgnoreCase("get")) {
           // get请求
           Map parameterMap = request.getParameterMap();
           if (!hasEncode) { // 确保get手动编码逻辑只运行一次
               for (String parameterName : parameterMap.keySet()) {
                   String[] values = parameterMap.get(parameterName);
                   if (values != null) {
                       for (int i = 0; i < values.length; i++) {
                           try {
                               // 处理get乱码
                               values[i] = new String(values[i]
                                      .getBytes("ISO-8859-1"), "utf-8");
                          } catch (UnsupportedEncodingException e) {
                               e.printStackTrace();
                          }
                      }
                  }
              }
               hasEncode = true;
          }
           return parameterMap;
      }
       return super.getParameterMap();
  }

   //取一个值
   @Override
   public String getParameter(String name) {
       Map parameterMap = getParameterMap();
       String[] values = parameterMap.get(name);
       if (values == null) {
           return null;
      }
       return values[0]; // 取回参数的第一个值
  }

   //取所有值
   @Override
   public String[] getParameterValues(String name) {
       Map parameterMap = getParameterMap();
       String[] values = parameterMap.get(name);
       return values;
  }
}

spring springmvc mybatis项目整合常用配置

• mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>

• applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

spring springmvc mybatis项目整合

Spring层

1、配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；

2、我们去编写Spring整合Mybatis的相关的配置文件；spring-dao.xml

<?xml version="1.0" encoding="UTF-8"?>


   
   
   

   
   
   
       
       
       
       
       

       
       
       
       
       
       
       
       
       
   

   
   
       
       
       
       
   

   
   
   
       
       
       
       
   

3、Spring整合service层

<?xml version="1.0" encoding="UTF-8"?>


   
   
    
	




   
   
       
       
   

SpringMVC层

1、web.xml

<?xml version="1.0" encoding="UTF-8"?>


   
   
       DispatcherServlet
       org.springframework.web.servlet.DispatcherServlet
       
           contextConfigLocation
             
           classpath:applicationContext.xml
       
       1
   
   
       DispatcherServlet
       /
   

   
   
       encodingFilter
       
          org.springframework.web.filter.CharacterEncodingFilter
       
       
           encoding
           utf-8
       
   
   
       encodingFilter
       /*
   
   

2、spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>


   
   
   
   
   

   
   
       
       
       
   

   
   

3、Spring配置整合文件，applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>


   
   
   
   

4、springmvc解决json格式中文乱码