一、Spring与Struts的整合

1.1：加入Spring的jar包。
1.2：加入Struts的jar包。
1.3：加入Struts与Spring的整合jar//struts2-spring-plugin-2.3.28.jar。

功能：将Struts中的Action对象交给Spring来管理。Spring可以往Action中依赖注入对象。

1.4　：配置文件

　　web.xml：


     
       
      
       spring_struts2_1
        
          
       
        index.html
           
       
        index.htm
           
       
        index.jsp
           
       
        default.html
           
       
        default.htm
           
       
        default.jsp
         
          
            
       
        contextConfigLocation
             
       
        classpath:spring.xml
         
          
            
       
        encoding
             
       
        filter.EncodingFilter
         
        
            
       
        encoding
             
       
        /*
         
          
            
       
        org.springframework.web.context.ContextLoaderListener
         
            
              
       
        struts2
               
       
        org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
           
          
              
       
        struts2
               
       
        /*

struts.xml

注意配置<constant name="struts.objectFactory" value="spring"></constant>

<constant name="struts.objectFactory.spring.autoWire" value="name"></constant> 这两个常量，第一个用于struts的action交给spring管理，并且spring注入的方式是根据名称来注入，比如TesetAction中有一个成员属性UserService userService(必须有set方法) 然后在spring.xml中配置一个bean 的id为"userService"的（必须与acton中的成员属性名一致），这样spring.xml的bean会自动关联到TestAction的userService里了。

spring.xml

1.5 写action、servlet、dao等

二、案例

配置文件：web.xml、struts.xml、spring.xml如上面所述。

index.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>    <%String path=request.getContextPath(); %>
     Insert title here    spring和struts2整合

TestAction.java

package action;import java.util.List;import org.apache.struts2.components.ActionComponent;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.util.ValueStack;import bean.UserBean;import service.UserServiceI;import util.BaseAction;public class TestAction extends BaseAction{    private UserServiceI userService;        public void setUserService(UserServiceI userService) {        this.userService = userService;    }    @Override    public String execute() throws Exception {            return null;    }        public String list(){        List
     
       userList=userService.getUserList();                ValueStack valuestack=ActionContext.getContext().getValueStack();                valuestack.set("userList", userList);                return "main";    }    }

```
UserServiceI .java
```

package service;import java.util.List;import bean.UserBean;public interface UserServiceI {    List
     
       getUserList();}

UserServiceImpl.java

package service;import java.util.List;import bean.UserBean;import dao.UserDao;public class UserServiceImpl implements UserServiceI {        private UserDao userdao;        public void setUserdao(UserDao userdao) {        this.userdao = userdao;    }    public List
     
       getUserList() {                return userdao.getUserList();    }}

UserDao.java

package dao;import java.util.List;import org.springframework.jdbc.core.BeanPropertyRowMapper;import org.springframework.jdbc.core.support.JdbcDaoSupport;import bean.UserBean;public class UserDao extends JdbcDaoSupport{    public List
     
       getUserList() {                String sql="select * from user";                List
      
        userList=this.getJdbcTemplate().query(sql, new BeanPropertyRowMapper
       
        (UserBean.class));                return userList;    }}

UserBean.java

package bean;public class UserBean {    private String userName;    private int age;    private String sex;    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }}

BaseAction.java

package util;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.struts2.interceptor.ServletRequestAware;import org.apache.struts2.interceptor.ServletResponseAware;import org.apache.struts2.util.ServletContextAware;import com.opensymphony.xwork2.ActionSupport;public abstract class BaseAction extends ActionSupport implements        ServletRequestAware, ServletResponseAware, ServletContextAware {    protected HttpServletRequest request;    protected HttpServletResponse response;    protected ServletContext context;    protected HttpSession session;    protected PrintWriter out;    public void setServletRequest(HttpServletRequest request) {        this.request = request;        if (this.request != null) {            this.session = this.request.getSession();        }    }    public void setServletResponse(HttpServletResponse response) {        this.response = response;        if (this.response != null) {            try {                this.response.setContentType("text/html");                this.out = this.response.getWriter();            } catch (IOException e) {                e.printStackTrace();            }        }    }    public void setServletContext(ServletContext context) {        this.context = context;    }    public abstract String execute() throws Exception;}

EncodingFilter.java

package filter;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import javax.servlet.http.HttpServletResponse;/** * 此过滤器用于解决get和post请求中问乱码的问题。 */public class EncodingFilter implements Filter {    public EncodingFilter() {          }    public void destroy() {            }/** *     要解决乱码问题首先区别对待POST方法和GET方法， *     1.如果是POST方法，则用request.setCharacterEncoding("UTF-8"); 即可 *     2.如果是GET方法，则麻烦一些，需要用decorator设计模式包装request对象来解决 */    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {         HttpServletRequest request=(HttpServletRequest)req;         HttpServletResponse response=(HttpServletResponse)res;                 //获取request请求是get还是post         String method=request.getMethod();                 if(method.equals("GET") || method.equals("get")){  //注意大小写都要判断，一般来说是大写的GET             /**              * request请求为get请求,则用包装类对request对象的getParameter方法进行覆盖。              */             response.setContentType("text/html;charset=UTF-8");             MyGetHttpServletRequestWrapper requestWrapper=new MyGetHttpServletRequestWrapper(request);             chain.doFilter(requestWrapper, response);                                   }else{             //post请求              response.setContentType("text/html;charset=UTF-8");             request.setCharacterEncoding("UTF-8");             chain.doFilter(request, response);                      }    }    public void init(FilterConfig fConfig) throws ServletException {    }}class MyGetHttpServletRequestWrapper extends HttpServletRequestWrapper{        HttpServletRequest request;    public MyGetHttpServletRequestWrapper(HttpServletRequest request) {        super(request);        this.request=request;            }    /**     *       servlet API中提供了一个request对象的Decorator设计模式的默认实现类HttpServletRequestWrapper,     *               (HttpServletRequestWrapper类实现了request接口中的所有方法，但这些方法的内部实现都是仅仅调用了一下所包装的的     *               request对象的对应方法) 以避免用户在对request对象进行增强时需要实现request接口中的所有方法。     *               所以当需要增强request对象时，只需要写一个类继承HttpServletRequestWrapper类，然后在重写需要增强的方法即可     * 具体步骤：      *1.实现与被增强对象相同的接口       *2、定义一个变量记住被增强对象     *3、定义一个构造函数，接收被增强对象 4、覆盖需要增强的方法 5、对于不想增强的方法，直接调用被增强对象（目标对象）的方法     */        @Override    public String getParameter(String name) {            String old_value=super.getParameter(name);        String new_value=null;                if(old_value!=null && !old_value.equals("")){            try {                new_value=new String(old_value.getBytes("ISO-8859-1"),"UTF-8");            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }                    }                return new_value;    }    @Override    public String[] getParameterValues(String name) {                String[] old_value=request.getParameterValues(name);        String[] new_value=new String[old_value.length];                if(old_value!=null && !old_value.equals("")){            String temp_value=null;            for(int i=0;i
     
       map = this.request.getParameterMap(); // 接受客户端的数据            Map
      
        newmap = new HashMap();            for (Map.Entry
       
         entry : map.entrySet()) {                String name = entry.getKey();                String values[] = entry.getValue();                if (values == null) {                    newmap.put(name, new String[] {});                    continue;                }                String newvalues[] = new String[values.length];                for (int i = 0; i < values.length; i++) {                    String value = values[i];                    value = new String(value.getBytes("iso8859-1"), this.request.getCharacterEncoding());                    newvalues[i] = value; // 解决乱码后封装到Map中                }                newmap.put(name, newvalues);            }            return newmap;        } catch (Exception e) {            throw new RuntimeException(e);        }    }}

main.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>    <%@ taglib prefix="s"  uri="/struts-tags" %>
     Insert title here    
             
     
     
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