分析

更新，就是将回显的数据，经过修改之后，并同步数据数据库中

后台代码

TestCompanyService

@Test
    public void test05(){
        //
        String id = "2a126a35-3178-46c5-9b48-ea3fa187386b";

        Company company = service.findById(id);
        l.info(company+" ");
        //模拟修改
        company.setCity("北京");
        l.info(company+" ");
        //将修改后的数据保存到数据库
        service.updateCompany(company);

    }

ICompanyService

void updateCompany(Company company);

CompanyServiceImpl

@Override
    public void updateCompany(Company company) {
        //调用dao操作数据库
        iCompanyDao.update(company);
    }

ICompanyDao

void update(Company company);

ICompanyDao.xml

<update id="update" parameterType="company">
     update ss_company
        set name           = #{name           },
            expiration_date= #{expirationDate},
            address        = #{address        },
            license_id     = #{licenseId     },
            representative = #{representative },
            phone          = #{phone          },
            company_size   = #{companySize   },
            industry       = #{industry       },
            remarks        = #{remarks        },
            state          = #{state          },
            balance        = #{balance        },
            city           = #{city           }
    where id = #{id}
    </update>

前台

company-update.jsp

action="${path}/company/update.do"

CompanyController

//${path}/company/update.do
    @RequestMapping(path="/update",method = RequestMethod.POST)
    public String update(Company company){ //表单的参数名要与实体类的变量名一样。
        l.info("update company="+company);

        iCompanyService.updateCompany(company);

        return "redirect:/company/toList.do";//跳转到列表页面
    }