SpringBoot---WEB開發入門

發現靜態資源可以訪問，並且默認statci路徑

package com.tzy.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;

/**
 * Created by 70416 on 2018/4/10.
 */
@ComponentScan("com.tzy.springbootH")
//表示開始注入spring容器，創建Tomcat，srping在加載
@EnableAutoConfiguration
public class APP {
    public static void main(String[] args) {
        //主函數的啓動入口，springboot是通過應用程序運行的
        SpringApplication.run(APP.class,args);
    }
}

package com.tzy.springbootH;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by 70416 on 2018/4/10.
 */
@RestController
public class IndexController {
    @RequestMapping("/indexc")
    public  String index(){
        System.out.println(5/0);
        return "indexc";
    }
}

做了一個數學異常，攔截

package com.tzy.springbootH;

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by 70416 on 2018/4/10.
 */
//全局捕獲異常類
@ControllerAdvice
public class GlobalExceptionHandler {
    //如果是返回json格式@ResponseBody 如果是返回頁面，返回String類型
    //類型結果制定404頁面
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody
    public Map<String,Object> resultError(){
        Map<String,Object> result = new HashMap<String,Object>();
        result.put("errorCode","500");
        result.put("errorMsg","系統錯誤！！");
        return result;
    }
}

原理其實就是spring的異常通知!

Spring整合頁面

freemarker,Velocity,thymeleaf就是動態頁面靜態化的模板引擎

pom加入引用

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.tzy.app</groupId>
    <artifactId>springboot_helloworld</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--引入springBoot父類依賴-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
    </parent>
    <dependencies>
        <!--springboot-wed組件 springmvc+spring+mybatis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--引入freeMarker的依賴包-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>

    </dependencies>


</project>

默認路徑

templates

建立freemarker

this is HelloWorld<br>

${name}<br>
<br><br>

<#if sex==1>
    男
    <#elseif sex==2>
    女
    <#else>
    其他
</#if>
<br>
<#list userlist as user>
    ${user}<br>
</#list>

package com.tzy.springbootH;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Created by 70416 on 2018/4/10.
 */
@Controller
public class IndexController {
    @RequestMapping("/index")
    public  String indexSY(Map<String,Object> result){
        System.out.println("IndexController...index");
        result.put("name","zhangsna");
        result.put("sex",1);
        List<String> list = new ArrayList<String>();
        list.add("lisi");
        list.add("wangwu");
        result.put("userlist",list);
        return "index";
    }
}

application.properties

# FREEMARKER (FreeMarkerAutoConfiguration)
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
spring.freemarker.prefix=
spring.freemarker.request-context-attribute=
spring.freemarker.settings.*=
spring.freemarker.suffix=.ftl
spring.freemarker.template-loader-path=classpath:/templates/ # comma-separated list
spring.freemarker.view-names= # whitelist of view names that can be resolved

spring boot整合jsp需要war類型的工程，加入jsp依賴

springboot整合jdbcTemplate

 <!--整合jdbcTemplate-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for test
-- ----------------------------
DROP TABLE IF EXISTS `test`;
CREATE TABLE `test` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `nums` int(11) NOT NULL,
  `name` varchar(45) COLLATE utf8_bin DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `idx_numbs` (`nums`)
) ENGINE=InnoDB AUTO_INCREMENT=4229 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

-- ----------------------------
-- Records of test
-- ----------------------------
INSERT INTO `test` VALUES ('1', '1', '2');
INSERT INTO `test` VALUES ('2', '12', 'name-test');
INSERT INTO `test` VALUES ('3', '12', 'name-test');
INSERT INTO `test` VALUES ('4', '12', 'A');
INSERT INTO `test` VALUES ('5', '12', 'A');
INSERT INTO `test` VALUES ('6', '12', 'A');
INSERT INTO `test` VALUES ('7', '12', 'A');
INSERT INTO `test` VALUES ('8', '12', 'A');
INSERT INTO `test` VALUES ('9', '12', 'A');
INSERT INTO `test` VALUES ('10', '12', '0');
INSERT INTO `test` VALUES ('11', '12', '0');
INSERT INTO `test` VALUES ('12', '0', '0');
INSERT INTO `test` VALUES ('13', '1', '0');
INSERT INTO `test` VALUES ('14', '2', '0');
INSERT INTO `test` VALUES ('15', '3', '0');
INSERT INTO `test` VALUES ('16', '4', '0');
INSERT INTO `test` VALUES ('17', '5', '0');
INSERT INTO `test` VALUES ('18', '6', '0');
INSERT INTO `test` VALUES ('19', '7', '0');
INSERT INTO `test` VALUES ('20', '8', '0');
INSERT INTO `test` VALUES ('21', '9', '0');
INSERT INTO `test` VALUES ('22', '0', '0');
INSERT INTO `test` VALUES ('23', '1', '0');
INSERT INTO `test` VALUES ('24', '2', '0');
INSERT INTO `test` VALUES ('25', '3', '0');
INSERT INTO `test` VALUES ('26', '4', '0');
INSERT INTO `test` VALUES ('27', '5', '0');
INSERT INTO `test` VALUES ('28', '6', '0');
INSERT INTO `test` VALUES ('29', '7', '0');
INSERT INTO `test` VALUES ('30', '8', '0');

spring.datasource.url=jdbc:mysql://localhost:3306/gp
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

package com.tzy.serivice;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;

/**
 * Created by 70416 on 2018/4/10.
 */
@Service
public class UserService {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    public void createUser(String name,Integer nums){
        System.out.println("createUser");
        jdbcTemplate.update("INSERT INTO test VALUES (null,?,?);",nums,name);
        System.out.println("創建用戶成功");
    }
}

package com.tzy.controller;

import com.tzy.serivice.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by 70416 on 2018/4/10.
 */
@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/createUser")
    public String createUser(String name, Integer nums) {
        userService.createUser(name, nums);
        return "seccess";
    }

}

重點APP換多包掃描

package com.tzy.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;

/**
 * Created by 70416 on 2018/4/10.
 */
@ComponentScan(basePackages = {"com.tzy.springbootH","com.tzy.serivice","com.tzy.controller"})
//表示開始注入spring容器，創建Tomcat，srping在加載
@EnableAutoConfiguration
public class APP {
    public static void main(String[] args) {
        //主函數的啓動入口，springboot是通過應用程序運行的
        SpringApplication.run(APP.class,args);
    }
}

成功了

JPA整合

加入依賴

   <!--JPA數據源-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

使用之前加入的數據源配置

寫一個實現類POJO

package com.tzy.entity;

import javax.annotation.Generated;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

/**
 * Created by 70416 on 2018/4/10.
 */
//註解對應數據庫表
@Entity(name="test")
public class User {
    @Id
    @GeneratedValue
    private Integer id;
    @Column
    private String name;
    @Column
    private Integer nums;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getNums() {
        return nums;
    }

    public void setNums(Integer nums) {
        this.nums = nums;
    }
}

dao

package com.tzy.dao;

import com.tzy.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Created by 70416 on 2018/4/10.
 */
//繼承這個就可以實現所有的怎刪改查  這就是JPA
public interface UserDao extends JpaRepository<User,Integer> {

}

service添加JPA方法，注意看區別

package com.tzy.serivice;

import com.tzy.dao.UserDao;
import com.tzy.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;

/**
 * Created by 70416 on 2018/4/10.
 */
@Service
public class UserService {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @Autowired
    private UserDao userDao;
    public void createUser(String name,Integer nums){
        System.out.println("createUser");
        jdbcTemplate.update("INSERT INTO test VALUES (null,?,?);",nums,name);
        System.out.println("創建用戶成功");
    }

    public User getJpaUser(Integer id){
        System.out.println("getUser");
        User one = userDao.findOne(id);
        System.out.println("查找用戶成功");
        return one;
    }

}

Controller

package com.tzy.controller;

import com.tzy.entity.User;
import com.tzy.serivice.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by 70416 on 2018/4/10.
 */
@RestController
public class UserController {
    @Autowired
    private UserService userService;
    //jdbcTemplate實現增加
    @RequestMapping("/createUser")
    public String createUser(String name, Integer nums) {
        userService.createUser(name, nums);
        return "seccess";
    }
    //jpa實現查找
    @RequestMapping("/getUser")
    public User getUser(Integer id){
        return userService.getJpaUser(id);
    }

}

package com.tzy.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.orm.jpa.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

/**
 * Created by 70416 on 2018/4/10.
 */
@ComponentScan(basePackages = {"com.tzy.springbootH","com.tzy.serivice","com.tzy.controller"})
@EnableJpaRepositories("com.tzy.dao")
@EntityScan("com.tzy.entity")
//表示開始注入spring容器，創建Tomcat，srping在加載
@EnableAutoConfiguration
public class APP {
    public static void main(String[] args) {
        //主函數的啓動入口，springboot是通過應用程序運行的
        SpringApplication.run(APP.class,args);
    }
}

*******************spring整合mybatis******************

POJO

package com.tzy.entity;

/**
 * Created by 70416 on 2018/4/10.
 */
public class User {
    private Integer id;
    private String name;
    private Integer nums;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getNums() {
        return nums;
    }

    public void setNums(Integer nums) {
        this.nums = nums;
    }
}

Mapper

package com.tzy.mapper;

import com.tzy.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

/**
 * Created by 70416 on 2018/4/10.
 */
public interface UserMapper {
    @Select("SELECT * FROM test WHERE NAME = #{name}")
    User findByName(@Param("name") String name);

    @Insert("INSERT INTO test VALUES(NULL,#{nums},#{name})")
    int insert(@Param("name") String name,@Param("nums")Integer nums);
}

Service

package com.tzy.serivice;

import com.tzy.entity.User;
import com.tzy.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created by 70416 on 2018/4/10.
 */
@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;


    public User findByName(String name){
        return userMapper.findByName(name);
    }

    public int insert(String name,Integer nums){
        return userMapper.insert(name, nums);
    }

}

Controller

package com.tzy.controller;

import com.tzy.entity.User;
import com.tzy.serivice.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by 70416 on 2018/4/10.
 */
@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/findByName")
    public User findByName(String name){
        return userService.findByName(name);
    }

    @RequestMapping("/insert")
    public String insert(String name,Integer nums){
        int insert = userService.insert(name, nums);
        if(insert>0){
            return "seccess";
        }
        return "error";
    }


}

啓動主入口

package com.tzy.app;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.orm.jpa.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

/**
 * Created by 70416 on 2018/4/10.
 */
@ComponentScan(basePackages = {"com.tzy.springbootH","com.tzy.serivice","com.tzy.controller"})
@MapperScan(basePackages = {"com.tzy.mapper"})
//表示開始注入spring容器，創建Tomcat，srping在加載
@EnableAutoConfiguration
public class APP {
    public static void main(String[] args) {
        //主函數的啓動入口，springboot是通過應用程序運行的
        SpringApplication.run(APP.class,args);
    }
}