Spring入门(二)

项目使用Gradle作为依赖管理工具。此项目建立在上一篇博客的基础上。

集成beetl

使用beetl作为视图引擎。

• 添加beetl依赖

    //模板引擎
    compile group: 'org.beetl', name: 'beetl-core', version: '2.2.3'

• 修改src/main/resources/spring-context-config.xml，使用beetl作为视图引擎。

• Controller

package cn.yerl.spring.demo.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping
public class IndexController {

    @RequestMapping("/engine")
    public ModelAndView engine(){
        ModelAndView view = new ModelAndView("engine");
        view.addObject("text", "Spring");
        return view;
    }
}

• 在src/main/java/webapp/WEB-INF/view下添加engine.html文件

    
    


Hello ${text}

在src/main/resources下添加beetl.properties文件，可以修改beetl的配置

返回Json

使用fastjson返回json格式的数据。

• 添加fastjson依赖

compile group: 'com.alibaba', name: 'fastjson', version: '1.2.17'

• 修改spring-context-config.xml

    
    

    
    

    
    
        
            
            
                
                    
                        text/html;charset=UTF-8
                        application/json
                    
                
            
        
    

• Controller

@Controller
@RequestMapping
public class IndexController {

    @RequestMapping("/json")
    public @ResponseBody Person json(){
        return new Person("Alan", 25);
    }
}

• Model

public class Person {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }

    public Person(){}

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}

• 效果

  
  
  

  2016-08-27-spring-json.png

集成Log4j

• gradle引用即可，需要排除commons-logging引用

    compile(group: 'org.springframework', name: 'spring-webmvc', version: '4.3.3.RELEASE'){
        exclude group: 'commons-logging'
    }
    
    compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.21'
    compile group: 'org.slf4j', name: 'jcl-over-slf4j', version: '1.7.21'
    compile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.7.21'

在src/main/resources中添加log4j.properties文件，并配置log4j

拦截器

• 实现拦截器

package cn.yerl.spring.demo.interceptor;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;


/**
 * Created by PoiSon on 2016/9/27.
 */
public class LogInterceptor implements HandlerInterceptor {
    protected final Log logger = LogFactory.getLog(getClass());

    private static final ThreadLocal sdf = new ThreadLocal() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        }
    };

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (handler instanceof HandlerMethod){
            HandlerMethod method = (HandlerMethod)handler;


            StringBuilder builder = new StringBuilder("Action report ----------- ").append(sdf.get().format(new Date())).append(" ---------------------------\n");
            builder.append("Controller  : ").append(method.getBeanType().getName()).append(".(").append(method.getBeanType().getSimpleName()).append(".java:1)\n");
            builder.append("Method      : ").append(method.getMethod().getName()).append("\n");

            Enumeration e = request.getParameterNames();
            if (e.hasMoreElements()){
                builder.append("Parameter   : ");
                while (e.hasMoreElements()){
                    String name = e.nextElement();
                    String[] values = request.getParameterValues(name);
                    if (values.length == 1) {
                        builder.append(name).append("=").append(values[0]);
                    }
                    else {
                        builder.append(name).append("[]={");
                        for (int i=0; i 0)
                                builder.append(",");
                            builder.append(values[i]);
                        }
                        builder.append("}");
                    }
                    builder.append("  ");
                }
                builder.append("\n");
            }
            builder.append("--------------------------------------------------------------------------------\n");

            logger.info(builder.toString());
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

此功能实现输出参数信息

• 修改spring-context-config.xml

集成beetlSql

• 添加beetlsql的引用和数据库的引用

    //数据库
    compile group: 'com.alibaba', name: 'druid', version: '1.0.26'
    compile group: 'com.ibeetl', name: 'beetlsql', version: '2.6.5'
    compile(group: 'org.springframework', name: 'spring-jdbc', version: '4.3.3.RELEASE')

• 修改spring-context-config.xml

    
    
        
            oracle.jdbc.driver.OracleDriver
        
        
            jdbc:oracle:thin:@192.168.0.185:1521:orcl
            
        
        
            hyoa_base
        
        
            hyoa
        
        
            2
        
        
            2