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# 基于 SpringBoot 的 SSM 整合案例

  • 代码演示

# controller 目录

# BookControoler

@SuppressWarnings("all")
@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private BookService bookService;
    @GetMapping
    public Result getAll(){
        List<Book> list = bookService.getAll();
        Integer code = list != null ? Code.SELECT_OK:Code.SELECT_ERR;
        String msg = list != null ? "执行成功":"执行失败";
        return new Result(list,code,msg);
    }
    @PostMapping
    public Result save(@RequestBody Book b){
        boolean f = bookService.save(b);
        Integer code = f ? Code.SAVE_OK:Code.SAVE_ERR;
        String msg = f ? "执行成功":"执行失败";
        return new Result(f,code,msg);
    }
    @PutMapping
    public Result update(@RequestBody Book b){
        boolean f = bookService.update(b);
        Integer code = f ? Code.UPDATE_OK:Code.UPDATE_ERR;
        String msg = f ? "执行成功":"执行失败";
        return new Result(f,code,msg);
    }
    @DeleteMapping("/{id}")
    public Result delete(@PathVariable Integer id){
        boolean f = bookService.delete(id);
        Integer code = f ? Code.DELETE_OK:Code.DELETE_ERR;
        String msg = f ? "执行成功":"执行失败";
        return new Result(f,code,msg);
    }
    @GetMapping("/{id}")
    public Result getById(@PathVariable Integer id){
        Book book = bookService.getById(id);
        Integer code = book != null ? Code.SELECT_OK:Code.SELECT_ERR;
        String msg = book != null ? "执行成功":"执行失败";
        return new Result(book,code,msg);
    }
}

# Code

public class Code {
    public static final Integer SAVE_OK = 20011;
    public static final Integer DELETE_OK = 20011;
    public static final Integer UPDATE_OK = 20011;
    public static final Integer SELECT_OK = 20011;
    public static final Integer SAVE_ERR = 20010;
    public static final Integer DELETE_ERR = 20010;
    public static final Integer UPDATE_ERR = 20010;
    public static final Integer SELECT_ERR = 20010;
    public static final Integer SYSTEM_ERR = 50011;
    public static final Integer BUSINESS_ERR = 50012;
    public static final Integer SYSTEM_TIMEOUT_ERR = 50013;
    public static final Integer SYSTEM_UNKNO_ERR = 5999;
}
# ProjectExceptionAdvice
@SuppressWarnings("all")
@RestControllerAdvice
public class ProjectExceptionAdvice {
    @ExceptionHandler(SystemException.class)
    public Result doSystemException(SystemException e){
        return new Result(null,e.getCode(),e.getMessage());
    }
}
# Result
@SuppressWarnings("all")
public class Result {
    private Object data;
    private Integer code;
    private String msg;
    public Result(Object data, Integer code, String msg) {
        this.data = data;
        this.code = code;
        this.msg = msg;
    }
    public Result(Object data, Integer code) {
        this.data = data;
        this.code = code;
    }
    public Result() {
    }
    public Object getData() {
        return data;
    }
    public void setData(Object data) {
        this.data = data;
    }
    public Integer getCode() {
        return code;
    }
    public void setCode(Integer code) {
        this.code = code;
    }
    public String getMsg() {
        return msg;
    }
    public void setMsg(String msg) {
        this.msg = msg;
    }
}
# dao 目录
# BookMapper
@SuppressWarnings("all")
@Mapper
public interface BookMapper {
    @Insert("insert into book (type,name,description) values (#{type},#{name},#{description})")
    int save(Book b);
    @Update("update book set (type=#{type},name=#{name},description=#{description} where id=#{id})")
    int update(Book b);
    @Delete("delete from book where id=#{id}")
    int delete(Integer id);
    @Select("select * from book where id=#{id}")
    Book getById(Integer id);
    @Select("select * from book")
    List<Book> getAll();
}
# domain 目录结构
# Book
public class Book{
	private Integer id;
	private String type;
	private String name;
	private String description;
	public Book(Integer id,String type,String name,String description){
		this.id = id;
		this.type = type;
		this.name = name;
		this.description = description;
	}
	public void setId(Integer id){
		this.id = id;
	}
	public Integer getId(){
		return id;
	}
	public void setType(String type){
		this.type = type;
	}
	public String getType(){
		return type;
	}
	public void setName(String name){
		this.name = name;
	}
	public String getName(){
		return name;
	}
	public void setDescription(String description){
		this.description = description;
	}
	public String getDescription(){
		return description;
	}
	@Override
	public String toString() {
		return "Book{" +
				"id=" + id +
				", type='" + type + '\'' +
				", name='" + name + '\'' +
				", description='" + description + '\'' +
				'}';
	}
}
# exception 目录
# SystemException
@SuppressWarnings("all")
public class SystemException extends RuntimeException{
    private Integer code;
    public SystemException(Integer code) {
        this.code = code;
    }
    public SystemException(String message, Integer code) {
        super(message);
        this.code = code;
    }
    public SystemException(String message, Throwable cause, Integer code) {
        super(message, cause);
        this.code = code;
    }
    public SystemException(Throwable cause, Integer code) {
        super(cause);
        this.code = code;
    }
    public SystemException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace, Integer code) {
        super(message, cause, enableSuppression, writableStackTrace);
        this.code = code;
    }
    public Integer getCode() {
        return code;
    }
    public void setCode(Integer code) {
        this.code = code;
    }
}
# service 目录与 impl
# BookService
@SuppressWarnings("all")
public interface BookService {
    /**
     * 保存用户信息
     * @param b
     * @return
     */
    boolean save(Book b);
    /**
     * 更新用户信息
     * @param b
     * @return
     */
    boolean update(Book b);
    /**
     * 按 id 删除用户信息
     * @param id
     * @return
     */
    boolean delete(Integer id);
    /**
     * 按用户 id 查询用户信息
     * @param id
     * @return
     */
    Book getById(Integer id);
    /**
     * 查询所有用户信息
     * @return
     */
    List<Book> getAll();
}
# BookServiceimpl
@SuppressWarnings("all")
@Service
public class BookServiceImpl implements BookService {
    @Autowired
    private BookMapper bookMapper;
    public boolean save(Book b){
        int i = bookMapper.save(b);
        if(i > 0)
            return true;
        return false;
    }
    public boolean update(Book b){
        int i = bookMapper.update(b);
        if(i > 0)
            return true;
        return false;
    }
    public boolean delete(Integer id){
        int i = bookMapper.delete(id);
        if(i > 0)
            return true;
        return false;
    }
    public Book getById(Integer id){
        return bookMapper.getById(id);
    }
    public List<Book> getAll(){
        return bookMapper.getAll();
    }
}
# 启动类
@SpringBootApplication
public class App {
    public static void main( String[] args ) {
        SpringApplication.run(App.class,args);
    }
}